Current Electricity

Related Questions

• A voltmeter has a range 0-V with a series resistance R. With a series resistance 2R, the range is 0-V'. The correct relation between V and V' is

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• The electric current passing through a metallic wire produces heat because of

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• Two wires A and B of same material and mass have their lengths in the ratio 1 : 2. On connecting them to the same source, the rate of heat dissipation in B is found to be 5W. The rate of heat dissipation in A is

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• There is a current of 20 amperes in a copper wire of ${10^{ - 6}}$ square metre area of cross-section. If the number of free electrons per cubic metre is ${10^{29}}$, then the drift velocity is

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• The two bulbs as in the above question are connected in series to a 200 volt line. Then

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