Current Electricity

Related Questions

• Two bulbs of 500 watt and 200 watt are manufactured to operate on 220 volt line. The ratio of heat produced in 500 W and 200 W, in two cases, when firstly they are joined in parallel and secondly in series, will be

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• What is the ratio of heat generated in R and 2R

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• In the circuit shown, the point ‘B’ is earthed. The potential at the point ‘A’ is

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• The temperature coefficient of resistance for a wire is $0.00125/^\circ C$. At 300K its resistance is 1 ohm. The temperature at which the resistance becomes 2 ohm is

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• A primary cell has an e.m.f. of 1.5 volts, when short-circuited it gives a current of 3 amperes. The internal resistance of the cell is

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