Electrostatics

The electric lines of force are____________? A. imaginary B. physically existing every where C. physically existing near the charges D. depends upon case

If free space between the plates of a capacitor is replaced by a dielectric_____________? A. The potential difference remains constant capacittance and energy stored increases B. The potential difference remains constant…

A hollow metallic sphere of 8cm diameter is charged with 4 x 10 8C. The potential on its surface will be_________________? A. 900 voltsB. 9000 volts C. 90 volts D. zero

Potential difference is the work done in moving unit positive charge form one point to another________________? A. in the direction of electric intensityB. against electric intensity C. in any direction D. in the direction of…

The value of the capacitance depends upon the________________? A. voltage applied B. thickness of the capacitor platesC. geometry of the capacitor D. dinsity of the capacitor plates

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 CB. 10-5 C C. 103 C D. 4 x 103 C

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

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

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

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