Current Electri...

A 10 ohm electric heater operates on a 110 V line. Calculate the rate at which it develops heat in watts

Two electric bulbs A and B are rated as 60 W and 100 W. They are connected in parallel to the same source. Then

A piece of fuse wire melts when a current of 15 ampere flows through it. With this current, if it dissipates 22.5 W, the resistance of fuse wire will be

Two wires \'A\' and ‘B\' of the same material have their lengths in the ratio 1 : 2 and radii in the ratio 2 : 1. The two wires are connected in parallel across a battery. The ratio of the heat produced in \'A\' to the heat produced in ‘B\' for the same time is

A heater draws a current of 2A when connected to a 250 V source. The rate of energy dissipation is

A bulb rated at (100 W - 200 V) is used on a 100V line. The current in the bulb is

A current i passes through a wire of length l, radius of cross-section r and resistivity ρ. The rate of heat generation is

Which of the following is not equal to watt?

If three bulbs 60 W, 100 W and 200 W are connected in parallel, then

If two wires having resistances R and 2 R both are joined in series and in parallel, then ratio of heat generated in this situation, applying the same voltage is