APNA CAREER: Coulomb’s Law |1 MARKS QUESTION

Coulomb’s Law
Coulomb’s Law |1 MARKS QUESTION | apna career
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1. What is Coulomb’s Law?

Answer: It gives the force between two charges.
Explanation: It depends on charges and distance.

2. State Coulomb’s Law.

Answer: Force is proportional to product of charges and inversely proportional to square of distance.
Explanation: Applies to point charges.

3. Write the formula of Coulomb’s Law.

Answer:

F = k \frac{q_{1} q_{2}}{r^{2}}

q_{1}

q_{2}

r

F = k \frac{q_{1} q_{2}}{r^{2}} \approx - 5.06

Explanation: $k$ is constant.

4. What is the SI unit of force in Coulomb’s Law?

Answer: Newton (N)
Explanation: Standard unit of force.

5. What is Coulomb constant (k)?

Answer: $9 \times 10^{9} N m^{2} / C^{2}$
Explanation: Value in vacuum.

6. On what factors does Coulomb force depend?

Answer: Charges and distance.
Explanation: Direct with charges, inverse with square of distance.

7. What happens if distance increases?

Answer: Force decreases.
Explanation: Inverse square relation.

8. What happens if charge increases?

Answer: Force increases.
Explanation: Directly proportional.

9. What type of force is Coulomb force?

Answer: Electrostatic force
Explanation: Acts between charges.

10. Is Coulomb force attractive or repulsive?

Answer: Both
Explanation: Depends on charges.

11. When is force attractive?

Answer: Between opposite charges
Explanation: + and – attract.

12. When is force repulsive?

Answer: Between like charges
Explanation: Same charges repel.

13. What is direction of Coulomb force?

Answer: Along line joining charges
Explanation: Straight line force.

14. What is nature of Coulomb force?

Answer: Conservative
Explanation: Work is path independent.

15. Does Coulomb law apply in medium?

Answer: Yes
Explanation: Value of $k$ changes.

16. What happens to force in medium?

Answer: It decreases
Explanation: Due to permittivity.

17. What is permittivity?

Answer: Property of medium
Explanation: Affects electric force.

18. Write Coulomb law in medium.

Answer:
$F = \frac{1}{4 π ε} \frac{q_{1} q_{2}}{r^{2}}$
Explanation: $ε$ = permittivity.

19. What is inverse square law?

Answer: Force ∝ $\frac{1}{r^{2}}$
Explanation: Fundamental nature of Coulomb force.

20. What is limitation of Coulomb’s Law?

Answer: Valid for point charges only
Explanation: Charges should be stationary and small.

21. What is vector form of Coulomb’s Law?

Answer:

\vec{F} = k \frac{q_{1} q_{2}}{r^{2}} \hat{r}

q_{1}

q_{2}

r

F = k \frac{q_{1} q_{2}}{r^{2}} \approx - 5.06

Explanation: Direction is given by unit vector $\hat{r}$ .

22. What does $\hat{r}$ represent?

Answer: Unit vector
Explanation: Shows direction of force.

23. What is effect of doubling both charges?

Answer: Force becomes 4 times
Explanation: $F \propto q_{1} q_{2}$

24. What happens if distance is halved?

Answer: Force becomes 4 times
Explanation: Inverse square law.

25. What happens if distance is tripled?

Answer: Force becomes $\frac{1}{9}$
Explanation: $F \propto \frac{1}{r^{2}}$

26. What is nature of Coulomb force at large distance?

Answer: Weak
Explanation: Force decreases rapidly.

27. What is nature at very small distance?

Answer: Strong
Explanation: Force increases significantly.

28. What is superposition principle in Coulomb’s Law?

Answer: Net force is vector sum of forces.
Explanation: Applies for multiple charges.

29. What is force between three charges?

Answer: Vector sum of pairwise forces
Explanation: Apply superposition.

30. What is effect of medium on Coulomb force?

Answer: Reduces force
Explanation: Due to permittivity.

31. What is relative permittivity?

Answer: Ratio $\frac{ε}{ε_{0}}$
Explanation: Also called dielectric constant.

32. What is force in medium in terms of dielectric constant?

Answer:
$F = \frac{1}{K} \cdot k \frac{q_{1} q_{2}}{r^{2}}$
Explanation: $K$ reduces force.

33. What is condition for maximum force?

Answer: Minimum distance
Explanation: Smaller $r$ → larger force.

34. What is condition for zero force?

Answer: One charge is zero
Explanation: No interaction.

35. What is direction of force for like charges?

Answer: Away from each other
Explanation: Repulsive force.

36. What is direction for unlike charges?

Answer: Towards each other
Explanation: Attractive force.

37. What is dimensional formula of Coulomb constant?

Answer: $[M L^{3} T^{- 4} I^{- 2}]$
Explanation: Derived from formula.

38. Is Coulomb force central force?

Answer: Yes
Explanation: Acts along line joining charges.

39. Is Coulomb force long-range or short-range?

Answer: Long-range
Explanation: Acts over large distances.

40. Can Coulomb force act in vacuum?

Answer: Yes
Explanation: No medium required.

41. What is Coulomb force proportional to?

Answer: Product of charges
Explanation: $F \propto q_{1} q_{2}$

42. What is Coulomb force inversely proportional to?

Answer: Square of distance
Explanation: $F \propto \frac{1}{r^{2}}$

43. What is effect if one charge is doubled?

Answer: Force doubles
Explanation: Direct proportionality.

44. What is effect if both charges are halved?

Answer: Force becomes one-fourth
Explanation: $F \propto q_{1} q_{2}$

45. What happens if distance becomes zero?

Answer: Force becomes infinite
Explanation: Not physically possible.

46. What is Coulomb force between neutral bodies?

Answer: Zero
Explanation: No net charge.

47. What is sign of force between unlike charges?

Answer: Negative (attractive)
Explanation: Indicates attraction.

48. What is sign of force between like charges?

Answer: Positive (repulsive)
Explanation: Indicates repulsion.

49. What is unit of charge used in Coulomb’s law?

Answer: Coulomb (C)
Explanation: SI unit.

50. What is distance measured in?

Answer: Meter (m)
Explanation: SI unit of length.

51. What is value of $\frac{1}{4 π ε_{0}}$ ?

Answer: $9 \times 10^{9}$
Explanation: Coulomb constant.

52. What is electric force nature compared to gravitational force?

Answer: Much stronger
Explanation: Electrostatic force is very strong.

53. What is dependence of Coulomb force on medium?

Answer: Depends on permittivity
Explanation: Different media reduce force.

54. What is dielectric constant symbol?

Answer: $K$
Explanation: Represents medium property.

55. What is effect of increasing dielectric constant?

Answer: Force decreases
Explanation: $F \propto \frac{1}{K}$

56. What is relation between force and permittivity?

Answer:
$F \propto \frac{1}{ε}$
Explanation: Higher permittivity → lower force.

57. What is force direction in vector form?

Answer: Along line joining charges
Explanation: Given by unit vector.

58. What is property of Coulomb force regarding path?

Answer: Path independent
Explanation: Conservative force.

59. What is interaction between charges at rest called?

Answer: Electrostatic interaction
Explanation: Covered by Coulomb law.

60. What is importance of Coulomb’s Law?

Answer: Basis of electrostatics
Explanation: Helps understand electric forces.

61. What is force when charges are in vacuum?

Answer: Maximum
Explanation: No medium reduces the force.

62. What is force when charges are in dielectric medium?

Answer: Less than in vacuum
Explanation: Due to dielectric constant.

63. What is formula of Coulomb force using permittivity?

Answer:
$F = \frac{1}{4 π ε_{0}} \frac{q_{1} q_{2}}{r^{2}}$
Explanation: Standard form in vacuum.

64. What is relation between force and dielectric constant?

Answer:
$F = \frac{F_{0}}{K}$
Explanation: $K$ reduces force.

65. What is effect of charge sign on magnitude of force?

Answer: No effect
Explanation: Sign affects direction only.

66. What is the nature of force between two electrons?

Answer: Repulsive
Explanation: Both have negative charge.

67. What is force between proton and electron?

Answer: Attractive
Explanation: Opposite charges attract.

68. What is the ratio of electric force to gravitational force?

Answer: Very large
Explanation: Electric force is much stronger.

69. What is Coulomb’s law validity condition?

Answer: Charges must be stationary
Explanation: Applies to electrostatics.

70. What is distance requirement for Coulomb’s law?

Answer: Charges should be point-like
Explanation: Size negligible compared to distance.

71. What is unit of permittivity?

Answer: F/m
Explanation: Farad per meter.

72. What is value of permittivity of free space?

Answer: $8.85 \times 10^{- 12} F / m$
Explanation: Constant value.

73. What is effect of medium like water on force?

Answer: Greatly reduced
Explanation: High dielectric constant.

74. What is force if one charge is zero?

Answer: Zero
Explanation: No interaction.

75. What is symmetry in Coulomb force?

Answer: Equal and opposite forces
Explanation: Newton’s third law.

76. What is direction of force on each charge?

Answer: Opposite directions
Explanation: Action–reaction pair.

77. What is electric force dependence on time?

Answer: Independent
Explanation: Static charges only.

78. What is Coulomb force field nature?

Answer: Radial
Explanation: Directed along radius.

79. What is effect of doubling distance?

Answer: Force becomes one-fourth
Explanation: Inverse square law.

80. What is effect of halving distance?

Answer: Force becomes four times
Explanation: Strong dependence on distance.

81. What is force between identical charges $q$ ?

Answer:
$F = k \frac{q^{2}}{r^{2}}$
Explanation: Same charges give squared term.

82. What happens if both charges are negative?

Answer: Repulsion
Explanation: Like charges repel.

83. What happens if both charges are positive?

Answer: Repulsion
Explanation: Same sign charges.

84. What is force if charges are unequal?

Answer: Depends on product
Explanation: $F \propto q_{1} q_{2}$

85. What is force if distance is very large?

Answer: Nearly zero
Explanation: Force decreases rapidly.

86. What is effect of reducing medium permittivity?

Answer: Force increases
Explanation: $F \propto \frac{1}{ε}$

87. What is relation between Coulomb force and electric field?

Answer:
$F = q E$
Explanation: Force on charge in field.

88. What is nature of electric field produced by charge?

Answer: Radial
Explanation: Outward/inward direction.

89. What is Coulomb force compared to nuclear force?

Answer: Weaker
Explanation: Nuclear force is strongest.

90. What is Coulomb force compared to gravitational force?

Answer: Much stronger
Explanation: Electric force dominates.

91. What is force when charges are extremely close?

Answer: Very large
Explanation: Inverse square effect.

92. What is effect of sign on force direction?

Answer: Determines attraction or repulsion
Explanation: Sign decides direction.

93. What is force symmetry between two charges?

Answer: Equal and opposite
Explanation: Newton’s third law.

94. What is SI unit of Coulomb constant?

Answer: $N m^{2} / C^{2}$
Explanation: Derived unit.

95. What is mathematical nature of Coulomb’s law?

Answer: Inverse square law
Explanation: Fundamental relation.

96. What is effect of charge distribution shape?

Answer: Law applies to point charges
Explanation: Needs modification for extended bodies.

97. What is electrostatic force direction in space?

Answer: Along straight line
Explanation: Central force.

98. What is magnitude of force always?

Answer: Positive
Explanation: Direction handled separately.

99. What is Coulomb’s law important for?

Answer: Calculating electric force
Explanation: Basic law of electrostatics.

100. What is basic assumption of Coulomb’s law?

Answer: Charges are stationary
Explanation: Applies only in electrostatics.

101. What is force between charges if $q_{1} = q_{2} = 0$ ?

Answer: Zero
Explanation: No charge → no force.

102. What happens if only one charge is present?

Answer: No force
Explanation: Interaction needs two charges.

103. What is dependence of force on sign of charges?

Answer: Determines nature of force
Explanation: Attraction or repulsion.

104. What is formula using permittivity explicitly?

Answer:
$F = \frac{1}{4 π ε} \frac{q_{1} q_{2}}{r^{2}}$
Explanation: General form in medium.

105. What is relation between $k$ and permittivity?

Answer:

k = \frac{1}{4 π ε_{0}}

Explanation: Defines Coulomb constant.

106. What is SI unit of electric force?

Answer: Newton
Explanation: Standard unit.

107. What is effect of charge magnitude on direction?

Answer: No effect
Explanation: Only sign matters.

108. What is relation between force and distance graph?

Answer: Inverse square curve
Explanation: Non-linear relation.

109. What is force if distance approaches infinity?

Answer: Zero
Explanation: Charges don’t interact at large distance.

110. What is Coulomb force classified as?

Answer: Central force
Explanation: Acts along line joining charges.

111. What is characteristic of central force?

Answer: Acts along radius
Explanation: No torque about center.

112. What is net force in system of many charges?

Answer: Vector sum
Explanation: Superposition principle.

113. What is unit of charge in CGS system?

Answer: Statcoulomb
Explanation: Different unit system.

114. What is Coulomb’s law in CGS system?

Answer:
$F = \frac{q_{1} q_{2}}{r^{2}}$
Explanation: No constant in CGS.

115. What is electric force nature compared to magnetic force?

Answer: Different
Explanation: Magnetic force needs motion.

116. What is Coulomb force independent of?

Answer: Time
Explanation: Static charges only.

117. What is force between charges placed in air?

Answer: Nearly same as vacuum
Explanation: Air permittivity ≈ vacuum.

118. What is effect of surrounding medium like glass?

Answer: Force decreases
Explanation: Higher dielectric constant.

119. What is force between charges at rest?

Answer: Electrostatic force
Explanation: Described by Coulomb’s law.

120. What is force between moving charges?

Answer: Not purely Coulomb
Explanation: Magnetic effects arise.

121. What is electric force nature in field theory?

Answer: Field-mediated
Explanation: Through electric field.

122. What is relation between field and force?

Answer:
$F = q E$
Explanation: Field produces force.

123. What is superposition for electric field?

Answer: Vector addition
Explanation: Same as force.

124. What is potential relation with force?

Answer: Force = gradient of potential
Explanation: Linked concepts.

125. What is importance in atomic structure?

Answer: Holds electrons and nucleus
Explanation: Coulomb attraction.

126. What is force between electron and nucleus?

Answer: Attractive
Explanation: Opposite charges.

127. What is role in bonding?

Answer: Electrostatic attraction
Explanation: Between ions.

128. What is force behavior in 3D space?

Answer: Radial
Explanation: Symmetric in all directions.

129. What is mathematical nature of force vector?

Answer: Directed quantity
Explanation: Has magnitude and direction.

130. What is force magnitude always?

Answer: Positive
Explanation: Direction handled separately.

131. What is force at very small separation physically?

Answer: Limited
Explanation: Other forces dominate.

132. What is Coulomb force at atomic scale?

Answer: Very strong
Explanation: Dominates atomic forces.

133. What is effect of sign reversal of both charges?

Answer: No change in force
Explanation: Product remains same.

134. What is effect of reversing one charge?

Answer: Direction changes
Explanation: Attraction ↔ repulsion.

135. What is field produced by charge responsible for?

Answer: Force on other charges
Explanation: Field concept.

136. What is relation between field lines and force?

Answer: Tangent gives direction
Explanation: Shows force direction.

137. What is symmetry in force distribution?

Answer: Uniform in all directions
Explanation: For isolated charge.

138. What is condition for equilibrium of charges?

Answer: Net force zero
Explanation: Balanced forces.

139. What is Coulomb force compared to weak force?

Answer: Stronger
Explanation: Weak force acts at nuclear level.

140. What is Coulomb force compared to strong force?

Answer: Weaker
Explanation: Strong force is strongest.

141. What is force law similar to Coulomb’s law?

Answer: Newton’s gravitational law
Explanation: Both inverse square.

142. What is key difference from gravity?

Answer: Can be attractive or repulsive
Explanation: Gravity only attractive.

143. What is medium effect absent in?

Answer: Vacuum
Explanation: No reduction.

144. What is Coulomb force nature mathematically?

Answer: Inverse square
Explanation: Fundamental interaction.

145. What is charge interaction type?

Answer: Pairwise
Explanation: Between two charges.

146. What is significance in electronics?

Answer: Basis of circuits
Explanation: Charge behavior.

147. What is force when charges are extremely large?

Answer: Very high
Explanation: Direct proportionality.

148. What is Coulomb law applicable in?

Answer: Electrostatics
Explanation: Charges at rest.

149. What is limitation regarding size of charges?

Answer: Must be point-like
Explanation: Size negligible.

150. What is conclusion of Coulomb’s Law?

Answer: Describes electric force
Explanation: Fundamental electrostatic law.

151. What is Coulomb force between charges of opposite sign?

Answer: Attractive
Explanation: Unlike charges attract.

152. What is Coulomb force between charges of same sign?

Answer: Repulsive
Explanation: Like charges repel.

153. What is the direction of force on $q_{1}$ ?

Answer: Along line joining charges
Explanation: Central force.

154. What is the nature of force between charges at rest?

Answer: Electrostatic
Explanation: No motion involved.

155. What is the force when distance is very small?

Answer: Very large
Explanation: Inverse square law.

156. What happens when distance increases greatly?

Answer: Force approaches zero
Explanation: Weak interaction.

157. What is the effect of doubling distance?

Answer: Force becomes one-fourth
Explanation: $F \propto \frac{1}{r^{2}}$

158. What is the effect of tripling distance?

Answer: Force becomes one-ninth
Explanation: Inverse square law.

159. What is the force if both charges are equal?

Answer: Symmetrical force
Explanation: Equal magnitude on both.

160. What is interaction force pair nature?

Answer: Equal and opposite
Explanation: Newton’s third law.

161. What is direction of force on each charge?

Answer: Opposite directions
Explanation: Action-reaction pair.

162. What is magnitude of force on both charges?

Answer: Same
Explanation: Equal forces.

163. What is the force if medium has high dielectric constant?

Answer: Reduced
Explanation: $F \propto \frac{1}{K}$

164. What is the force if medium is vacuum?

Answer: Maximum
Explanation: No reduction factor.

165. What is effect of increasing charge?

Answer: Force increases
Explanation: Direct relation.

166. What is effect of decreasing charge?

Answer: Force decreases
Explanation: Proportional relation.

167. What is the shape of force-distance graph?

Answer: Hyperbolic curve
Explanation: Inverse square nature.

168. What is force nature for large charge values?

Answer: Very strong
Explanation: Direct proportionality.

169. What is force when one charge is negative?

Answer: Depends on other charge
Explanation: Determines attraction/repulsion.

170. What is force if charges are equal and opposite?

Answer: Attractive
Explanation: Opposite charges.

171. What is Coulomb force independent of?

Answer: Time
Explanation: Static charges only.

172. What is Coulomb force dependent on?

Answer: Charge and distance
Explanation: Main factors.

173. What is the field responsible for Coulomb force?

Answer: Electric field
Explanation: Mediates interaction.

174. What is interaction range of Coulomb force?

Answer: Infinite
Explanation: Long-range force.

175. What is the force if charges are placed in oil?

Answer: Less than in air
Explanation: Higher dielectric constant.

176. What is force in air compared to vacuum?

Answer: Nearly same
Explanation: Air permittivity ≈ vacuum.

177. What is Coulomb force nature in vector form?

Answer: Vector quantity
Explanation: Has magnitude and direction.

178. What is scalar part of Coulomb force?

Answer: Magnitude
Explanation: Value without direction.

179. What is vector part of Coulomb force?

Answer: Direction
Explanation: Given by unit vector.

180. What is force symmetry property?

Answer: Equal magnitude
Explanation: For both charges.

181. What is interaction between charges called?

Answer: Electrostatic interaction
Explanation: Governed by Coulomb’s law.

182. What is force law similarity?

Answer: Similar to gravity
Explanation: Both inverse square.

183. What is difference from gravity?

Answer: Can repel or attract
Explanation: Gravity only attracts.

184. What is field direction for positive charge?

Answer: Outward
Explanation: Radial direction.

185. What is field direction for negative charge?

Answer: Inward
Explanation: Towards charge.

186. What is force experienced by test charge?

Answer: Due to electric field
Explanation: $F = q E$

187. What is requirement for Coulomb law validity?

Answer: Charges must be stationary
Explanation: Electrostatic condition.

188. What is condition regarding size of charges?

Answer: Must be point charges
Explanation: Size negligible.

189. What is force if charges are very far?

Answer: Negligible
Explanation: Weak interaction.

190. What is behavior of force in different media?

Answer: Varies
Explanation: Depends on permittivity.

191. What is Coulomb force nature in free space?

Answer: Maximum
Explanation: No dielectric effect.

192. What is interaction strength compared to magnetic force?

Answer: Generally stronger
Explanation: At rest condition.

193. What is effect of reversing both charges?

Answer: No change
Explanation: Product remains same.

194. What is effect of reversing one charge?

Answer: Force direction changes
Explanation: Attraction ↔ repulsion.

195. What is role in atomic structure?

Answer: Binds electrons to nucleus
Explanation: Electrostatic attraction.

196. What is role in ionic bonding?

Answer: Attraction between ions
Explanation: Opposite charges.

197. What is force dependence on orientation?

Answer: Along straight line
Explanation: Central force.

198. What is Coulomb force law type?

Answer: Fundamental law
Explanation: Basic electrostatics.

199. What is nature of force field lines?

Answer: Radial
Explanation: From/to charge.

200. What is summary of Coulomb’s Law?

Answer: Force between charges depends on magnitude and distance
Explanation: Core electrostatic principle.

201. What is force between two unit charges at unit distance?

Answer: $9 \times 10^{9} N$
Explanation: From Coulomb constant value.

202. What is effect of reducing distance to half?

Answer: Force becomes 4 times
Explanation: Inverse square law.

203. What is effect of increasing distance 4 times?

Answer: Force becomes $\frac{1}{16}$
Explanation: $F \propto \frac{1}{r^{2}}$

204. What is the direction of electric force?

Answer: Along line joining charges
Explanation: Central force.

205. What happens if charges are very small?

Answer: Force is small
Explanation: Direct proportionality.

206. What happens if charges are very large?

Answer: Force is large
Explanation: Strong interaction.

207. What is force between equal charges at same distance?

Answer: Same magnitude
Explanation: Symmetry.

208. What is nature of force in electrostatics?

Answer: Non-contact
Explanation: Acts without touching.

209. What is effect of dielectric medium?

Answer: Reduces force
Explanation: Due to permittivity.

210. What is force direction for positive and negative charge?

Answer: Towards each other
Explanation: Attraction.

211. What is force direction for same charges?

Answer: Away from each other
Explanation: Repulsion.

212. What is mathematical relation of force with charge?

Answer: Directly proportional
Explanation: $F \propto q$

213. What is mathematical relation of force with distance?

Answer: Inverse square
Explanation: $F \propto \frac{1}{r^{2}}$

214. What is behavior of force in vacuum?

Answer: Maximum
Explanation: No medium effect.

215. What is behavior of force in water?

Answer: Much reduced
Explanation: High dielectric constant.

216. What is force between charges in air?

Answer: Nearly same as vacuum
Explanation: Air permittivity ≈ vacuum.

217. What is basic principle of Coulomb’s Law?

Answer: Interaction between charges
Explanation: Fundamental concept.

218. What is force when one charge is doubled?

Answer: Force doubles
Explanation: Direct relation.

219. What is force when both charges are doubled?

Answer: Force becomes 4 times
Explanation: Product increases.

220. What is force when both charges are halved?

Answer: Force becomes one-fourth
Explanation: $F \propto q_{1} q_{2}$

221. What is effect of medium with low permittivity?

Answer: Force increases
Explanation: $F \propto \frac{1}{ε}$

222. What is force between charges at rest called?

Answer: Electrostatic force
Explanation: Static interaction.

223. What is force between moving charges?

Answer: Not purely Coulomb
Explanation: Magnetic effects involved.

224. What is direction of force on test charge?

Answer: Same as electric field
Explanation: For positive charge.

225. What is force magnitude always?

Answer: Positive
Explanation: Direction handled separately.

226. What is relation between field and force?

Answer:
$F = q E$
Explanation: Fundamental relation.

227. What is force behavior for very large separation?

Answer: Negligible
Explanation: Weak interaction.

228. What is role of Coulomb’s Law in physics?

Answer: Fundamental law
Explanation: Basis of electrostatics.

229. What is effect of reversing both charges?

Answer: No change
Explanation: Product remains same.

230. What is effect of reversing one charge?

Answer: Direction changes
Explanation: Attraction ↔ repulsion.

231. What is Coulomb force range?

Answer: Infinite
Explanation: Long-range force.

232. What is nature of force graph?

Answer: Non-linear
Explanation: Inverse square relation.

233. What is force at atomic level?

Answer: Very strong
Explanation: Dominates interactions.

234. What is force compared to gravity?

Answer: Much stronger
Explanation: Electric force dominates.

235. What is force compared to nuclear force?

Answer: Weaker
Explanation: Nuclear force strongest.

236. What is symmetry in Coulomb force?

Answer: Equal and opposite
Explanation: Newton’s third law.

237. What is field produced by charge?

Answer: Electric field
Explanation: Causes force.

238. What is relation of Coulomb force to field lines?

Answer: Along field lines
Explanation: Direction given by field.

239. What is force if charge is zero?

Answer: Zero
Explanation: No interaction.

240. What is effect of medium on electric field?

Answer: Reduces field
Explanation: Due to polarization.

241. What is nature of Coulomb force in 3D?

Answer: Radial
Explanation: Symmetric.

242. What is relation between Coulomb law and Gauss law?

Answer: Both describe electric field
Explanation: Fundamental laws.

243. What is force if charges are identical and distance same?

Answer: Same value
Explanation: Symmetry.

244. What is requirement for accurate application?

Answer: Point charges
Explanation: Size negligible.

245. What is effect of changing medium repeatedly?

Answer: Force changes
Explanation: Depends on permittivity.

246. What is role in electrostatics problems?

Answer: Calculation of force
Explanation: Core formula.

247. What is nature of Coulomb force in equilibrium?

Answer: Balanced
Explanation: Net force zero.

248. What is force direction if both charges negative?

Answer: Away
Explanation: Repulsion.

249. What is force direction if both charges positive?

Answer: Away
Explanation: Repulsion.

250. What is overall summary of Coulomb’s Law?

Answer: Force depends on charge and distance
Explanation: Fundamental electrostatic relation.

251. What is force between two charges separated by infinite distance?

Answer: Zero
Explanation: No interaction at infinite separation.

252. What is nature of Coulomb force for static charges?

Answer: Electrostatic
Explanation: Charges are at rest.

253. What is interaction between multiple charges called?

Answer: Superposition
Explanation: Sum of all forces.

254. What is net force in system of charges?

Answer: Vector sum
Explanation: Add all forces.

255. What is Coulomb force dependence on medium?

Answer: Depends on permittivity
Explanation: Different materials affect force.

256. What is Coulomb force direction always?

Answer: Along line joining charges
Explanation: Straight line force.

257. What is effect of equal charges placed closer?

Answer: Force increases
Explanation: Distance decreases.

258. What is effect of opposite charges placed closer?

Answer: Attraction increases
Explanation: Stronger force.

259. What is Coulomb force nature in vacuum?

Answer: Maximum
Explanation: No dielectric reduction.

260. What is Coulomb force nature in glass?

Answer: Reduced
Explanation: High dielectric constant.

261. What is unit of Coulomb constant?

Answer: Nm²/C²
Explanation: SI derived unit.

262. What is formula for Coulomb force in vacuum?

Answer:

F = k \frac{q_{1} q_{2}}{r^{2}}

q_{1}

q_{2}

r

F = k \frac{q_{1} q_{2}}{r^{2}} \approx - 5.06

Explanation: Basic formula.

263. What is relation between force and charge sign?

Answer: Determines direction
Explanation: Attraction or repulsion.

264. What is Coulomb force nature as a vector?

Answer: Has direction and magnitude
Explanation: Vector quantity.

265. What is Coulomb force nature as scalar?

Answer: Magnitude only
Explanation: Without direction.

266. What is force when both charges are very small?

Answer: Very small
Explanation: Weak interaction.

267. What is force when both charges are very large?

Answer: Very large
Explanation: Strong interaction.

268. What is Coulomb force independent of?

Answer: Time
Explanation: Static charges.

269. What is Coulomb force dependent on?

Answer: Distance and charge
Explanation: Main variables.

270. What is Coulomb force symmetry?

Answer: Equal and opposite
Explanation: Newton’s third law.

271. What is electric field relation with Coulomb force?

Answer:
$F = q E$
Explanation: Force due to field.

272. What is direction of electric field for positive charge?

Answer: Outward
Explanation: Away from charge.

273. What is direction of electric field for negative charge?

Answer: Inward
Explanation: Towards charge.

274. What is Coulomb force at atomic scale?

Answer: Very strong
Explanation: Dominates atomic forces.

275. What is Coulomb force range?

Answer: Infinite
Explanation: Long-range force.

276. What is Coulomb force graph nature?

Answer: Inverse square curve
Explanation: Non-linear relation.

277. What is Coulomb force behavior in conductor?

Answer: Charges move to surface
Explanation: Equilibrium condition.

278. What is Coulomb force effect in capacitor?

Answer: Stores energy
Explanation: Charge interaction.

279. What is Coulomb force effect in atoms?

Answer: Holds electrons
Explanation: Attraction to nucleus.

280. What is Coulomb force effect in molecules?

Answer: Chemical bonding
Explanation: Electrostatic interaction.

281. What is Coulomb force compared to gravitational force?

Answer: Much stronger
Explanation: Electric force dominates.

282. What is Coulomb force compared to nuclear force?

Answer: Weaker
Explanation: Nuclear force strongest.

283. What is Coulomb force type?

Answer: Fundamental force
Explanation: Basic interaction.

284. What is Coulomb force between neutral bodies?

Answer: Zero
Explanation: No net charge.

285. What is Coulomb force behavior at equilibrium?

Answer: Net force zero
Explanation: Balanced system.

286. What is Coulomb force behavior for identical charges?

Answer: Repulsive
Explanation: Same sign.

287. What is Coulomb force behavior for opposite charges?

Answer: Attractive
Explanation: Opposite sign.

288. What is Coulomb force dependence on medium type?

Answer: Varies
Explanation: Depends on permittivity.

289. What is Coulomb force effect in electric field lines?

Answer: Shows direction
Explanation: Tangent gives force direction.

290. What is Coulomb force nature in 3D space?

Answer: Radial
Explanation: Symmetrical.

291. What is Coulomb force role in electrostatics?

Answer: Basic law
Explanation: Foundation of chapter.

292. What is Coulomb force relation to Gauss law?

Answer: Both describe field
Explanation: Linked concepts.

293. What is Coulomb force effect of increasing distance?

Answer: Decreases rapidly
Explanation: Inverse square.

294. What is Coulomb force effect of decreasing distance?

Answer: Increases rapidly
Explanation: Strong dependence.

295. What is Coulomb force effect of increasing charge?

Answer: Increases
Explanation: Direct relation.

296. What is Coulomb force effect of decreasing charge?

Answer: Decreases
Explanation: Proportional relation.

297. What is Coulomb force direction for like charges?

Answer: Away
Explanation: Repulsion.

298. What is Coulomb force direction for unlike charges?

Answer: Towards
Explanation: Attraction.

299. What is Coulomb force importance in electronics?

Answer: Basis of circuits
Explanation: Charge interaction.

300. What is final conclusion of Coulomb’s Law?

Answer: Force depends on charge and distance
Explanation: Fundamental electrostatic law.

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Coulomb’s Law |1 MARKS QUESTION | apna career

Coulomb’s LawCoulomb’s Law |1 MARKS QUESTION | apna careerHOME

1. What is Coulomb’s Law?

2. State Coulomb’s Law.

3. Write the formula of Coulomb’s Law.

4. What is the SI unit of force in Coulomb’s Law?

5. What is Coulomb constant (k)?

6. On what factors does Coulomb force depend?

7. What happens if distance increases?

8. What happens if charge increases?

9. What type of force is Coulomb force?

10. Is Coulomb force attractive or repulsive?

11. When is force attractive?

12. When is force repulsive?

13. What is direction of Coulomb force?

14. What is nature of Coulomb force?

15. Does Coulomb law apply in medium?

16. What happens to force in medium?

17. What is permittivity?

18. Write Coulomb law in medium.

19. What is inverse square law?

20. What is limitation of Coulomb’s Law?

21. What is vector form of Coulomb’s Law?

22. What does r^r^ represent?

23. What is effect of doubling both charges?

24. What happens if distance is halved?

25. What happens if distance is tripled?

26. What is nature of Coulomb force at large distance?

27. What is nature at very small distance?

28. What is superposition principle in Coulomb’s Law?

29. What is force between three charges?

30. What is effect of medium on Coulomb force?

31. What is relative permittivity?

32. What is force in medium in terms of dielectric constant?

33. What is condition for maximum force?

34. What is condition for zero force?

35. What is direction of force for like charges?

36. What is direction for unlike charges?

37. What is dimensional formula of Coulomb constant?

38. Is Coulomb force central force?

39. Is Coulomb force long-range or short-range?

40. Can Coulomb force act in vacuum?

41. What is Coulomb force proportional to?

42. What is Coulomb force inversely proportional to?

43. What is effect if one charge is doubled?

44. What is effect if both charges are halved?

45. What happens if distance becomes zero?

46. What is Coulomb force between neutral bodies?

47. What is sign of force between unlike charges?

48. What is sign of force between like charges?

49. What is unit of charge used in Coulomb’s law?

50. What is distance measured in?

51. What is value of 14πε04πε0​1​?

52. What is electric force nature compared to gravitational force?

53. What is dependence of Coulomb force on medium?

54. What is dielectric constant symbol?

55. What is effect of increasing dielectric constant?

56. What is relation between force and permittivity?

57. What is force direction in vector form?

58. What is property of Coulomb force regarding path?

59. What is interaction between charges at rest called?

60. What is importance of Coulomb’s Law?

61. What is force when charges are in vacuum?

62. What is force when charges are in dielectric medium?

63. What is formula of Coulomb force using permittivity?

64. What is relation between force and dielectric constant?

65. What is effect of charge sign on magnitude of force?

66. What is the nature of force between two electrons?

67. What is force between proton and electron?

68. What is the ratio of electric force to gravitational force?

Coulomb’s Law
Coulomb’s Law |1 MARKS QUESTION | apna career
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22. What does $\hat{r}$ represent?

51. What is value of $\frac{1}{4 π ε_{0}}$ ?

81. What is force between identical charges $q$ ?

101. What is force between charges if $q_{1} = q_{2} = 0$ ?

105. What is relation between $k$ and permittivity?