..........is a device to obtain high p.d. from low d.c. potential difference.

Find potential difference between B and C.

In the circuit shown, the current through the 4Omega resistor is 1 A, when the points P and M are connected to a d.c. source. The potential difference between the points M and N is

Name a device that help to maintain a potential difference across a conductor?

Find potential difference between B and C?

Energy per unit volume for a capacitor having area A and separation d kept at a potential difference V is given by: