Name a device that helps to maintain a potential difference across a conductor.

Statement - (A): A steady current is flowing in a cylindrical conductor, the electric field with in the conductor is not zero. Statement-(B):Electrons in a conductor have no motion in the absence of a potential difference across it.

The SI unit of potential difference is …………….

4muF capacitor and a resistance 2.5M Omega are in series with 12V battery, Find the time after which the potential difference across the capacitor is 3 times the potential difference across the resistor. [Given In ( 2 ) = 0.693]

According to Joule's law, if the potential difference across a conductor having a material of specific resistance p remains constant, then the heat produced in the conductor is directly proportional

An electric lamp, whose resistance is 20 Omega , and a conductor of 4 Omega resistance are connected to a 6 V battery (Fig. 12.9). Calculate (a) the total resistance of the circuit, (b) the current through the circuit, and (c) the potential difference across the electric lamp and conductor.

Draw a circuit diagram for a circuit in which two resistors A and B are connected in series with a battery and voltmeter is connected to measure the potential difference across the resistor A.