121. Value of εr for various dielectrics is always________________?
A. Less than unity
B. Equal to the unit
C. Larger than unit
D. No hard and fast rule

122. SI unit of the permittivity of free space is________________?
A. Nm2C2
B. N-1mC-2
C. NmC-1
D. N-1m-2C2

123. The number of electrons in one coulomb charge is equal to_______________?
A. 6.2 x 1018
B. 1.6 x 1019
C. 6.2 x 1021
D. 1.6 x 10-27

124. Equivalent capacitance is greater than individual capacitances in_____________?
A. series combination
B. parallel combination
C. both series and parallel combinations
D. none of above

125. A 5 μF capacitor has a potential difference across its plates of 200 volts. The charge on the capacitor is____________?
A. 2.5 x 10-8 C
B. 10-5 C
C. 103 C
D. 4 x 103 C

126. In a non-uniform electric field a polar molecule will experience____________?
A. Net torque
B. Net force
C. both series and parallel combinations
D. zero

127. Electric intensity at infinite distance from the point charge is_____________?
A. zero
B. infinite
C. positive
D. negative

128. A charge of 0.10C accelerated through a potential difference of 1000V acquires kinetic energy_______________?
A. 200J
B. 100J
C. 1000J
D. 100 eV

129. A capacitor is a perfect insulator for______________?
A. direct current
B. alternating current
C. both for the direct and alternating current
D. none of above

130. In a charged capacitor the energy resides in________________?
A. magnetic hield
B. electric field
C. nuclear field
D. gravitational field