Physics Class 10th

121. ꜫ₀ is also called as:

A) Proximity constant

B) Permittivity of free space

C) Coulombs Constant.

D) None of the above

122. The value of Coulomb force depends upon:

A) The Conductors

B) The medium between the charges

C) The charges in the conducting surfaces

D) All of the above.

123. The Permittivity of material is represented by:

A)ꜫ

B) π

C)ϒ

D)µ

124. A material medium with high permittivity is a medium which:

A) Increases the coulomb force between the charges

B) reduces the coulomb force between the charges.

C) Increases the resistance of conductor

D) none of the above.

125. The permittivity of air is ______ than vacuum.

A) Lesser

B) Equal

C) Slightly greater

D) Greater

126. The attraction of an uncharged object by a charged object near is due to:

A) Electrostatics

B) Self Induction

C) Mutual induction

D) Electrostatic induction

127. The coulomb forces ______ as the distance between similar charges increases.

A) Increases

B) Decreases

C) remains same

D) it has no relation to the distance

128. Gravitational forces are ______.

A) Attractive

B) Repulsive

C) Both A and B

D) None

129. Coulomb Forces are_______

A) Attractive

B) Repulsive

C) Both A and B

D) None of the above.

130. Electrostatic forces depend on:

A) The sq of distance between charges

B) Inverse of sq of distance between charges

C) Mass of the point charge

D) Velocity of the point charge

131. Two protons in the atomic nucleus of helium atom push each other with force of:

A) 25N

B) 32N

C) 47N

D) 58 N

132. The region around a charge in which an electric test charge would experience an electric force is called:

A) Magnetic Field

B) Force Field

C) Electric Force

D) Electric Field.

133. The strength of field at any point is called:

A) Electric Field

B) Electric Power

C) Electric Field Intensity

D) None of the above.

134. An electric field exists in the region of space around a charged object in ____ dimensions.

A) One

B) Two

C) Three

D) Electric Field does not exist around object.

135. When another charged object enters the electrical field, an electric force acts on it even without any physical contact between the charges.

A) True

B) False

136. E= FE /q0, this equation gives the mathematical representation of:

A) Electric Field

B) Electric Field intensity

C) Electrical Induction

D) None of the above.

137. The SI unit of electric field intensity is :

A) N

B) NC^-1

C) ms^-1

D) none of the above.

138. Test charge is always taken:

A) Positive

B) Negative

C) Does not matter.

139. The size of test charge is always taken small because:

A) To avoid repulsion

B) To avoid attraction

C) Both A and B

D) To avoid distortion in the field.

140. Electric field lines can be defined as:

A) The path of attraction

B) The path of repulsion

C) The direction of electric field

D) None of the above