The potential at a point is 20 V. What is the work done to bring a charge of 0.5 C from infinity to this point.

The quantity of heat generated in a conductor when a current flows through it is directly proportional to the
(a) resistance of the conductor.
(b) current carried by the conductor.
(c) time for which the current flows

Two light bulbs P and Q are identical in all respects, except that P's filament is thicker than Q's. If the same potential difference is applied to each, then

The resistance of a metal wire is reduced by reducing its
a. cross-sectional area
b. length
c. temperature

Two light bulbs are marked 230 V; 75 W and 230 V; 150 W. If the first bulb has a resistance R, then what is the resistance of the second bulb?

Resistance changes electricity to heat. Which of these appliances uses this property?

In the circuit shown the bulb marked 2R has twice the resistance of the bulb marked R. Compared with bulb 2R, the current in bulb R and its brightness compared to the other bulb, is 

What is the phenomenon of electromagnetic induction ?

Find the time required to deposit electrolytically 2 gm of gold by passing a current of 2 A. The e.c.e.of gold is 0.0006812 gm/coulomb.

What is the charge, in Coulombs, which passes a point in a circuit in 1 minute when a current of 3 A is flowing?