Current Electricity

Related Questions

• A current Iis passing through a wire having two sections P and Q of uniform diameters $d$ and $d/2$ respectively. If the mean drift velocity of electrons in sections P and Q is denoted by $v_P$ and $v_Q$ respectively, then

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• A copper wire of length 1 m and radius 1 mm is joined in series with an iron wire of length 2 m and radius 3 mm and a current is passed through the wires. The ratio of the current density in the copper and iron wires is

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

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• A storage cell is charged by 5 amp D.C. for 18 hours. Its strength after charging will be

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• In the given circuit the current $I_1$ is

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