When 4 volts e.m.f. is applied across a 1 farad capacitor, it will store energy of

For making a capacitor, it is better to select a dielectric having

A. low permittivity

B. high permittivity

C. permittivity same as that of air

D. permittivity slightly more than that of air

The power dissipated in a pure capacitor is

A. zero

B. proportional to applied voltage

C. proportional to value of capacitance

D. both (B) and (C) above

When a dielectric slab is introduced in a parallel plate capacitor, the potential difference between plates will

A. remain uncharged

B. decrease

C. increase

D. become zero

Which of the following capacitors will have the least value of breakdown voltage ?

A. Mica

B. Paper

C. Ceramic

D. Electrolytic