Questions in Current Electricity

Select	Question
	Resistance of one carbon filament and one tungsten lamp are measured individually when the lamp are lit and compared with their respective resistances when cold. Which one of the following statements will be true
	The mechanism of the heat produced in a conductor when an electric current flows through it, can be explained on the basis of
	Two electric bulbs whose resistances are in the ratio of 1 : 2 are connected in series. The powers dissipated in them have the ratio
	You are given a resistance wire of length 50 cm and a battery of negligible resistance. In which of the following cases is largest amount of heat generated
	What is immaterial for an electric fuse wire
	The electric bulbs have tungsten filaments of same length. If one of them gives 60 watt and other 100 watt, then
	Three equal resistors connected in series across a source of e.m.f. together dissipate 10 watt. If the same resistors are connected in parallel across the same e.m.f., then the power dissipated will be
	How much energy in kilowatt hour is consumed in operating ten 50 watt bulbs for 10 hours per day in a month (30 days).
	(1) The product of a volt and a coulomb is a joule. (2) The product of a volt and an ampere is a joule/second. (3) The product of volt and watt is horse power. (4) Watt-hour can be measured in terms of electron volt. State if
	A 25 W, 220 V bulb and a 100 W, 220 V bulb are connected in parallel across a 440 V line