Current Electricity

Related Questions

• A galvanometer can be used as a voltmeter by connecting a

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• Potential difference between the points P and Q in the electric circuit shown is

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• The resistance of a wire is R. If the length of the wire is doubled by stretching, then the new resistance will be

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• An unknown resistance $R_1$ is connected in series with a resistance of $10 \Omega$. This combinations is connected to one gap of a metre bridge while a resistance $R_2$ is connected in the other gap. The balance point is at 50 cm. Now, when the $10 \Omega$ resistance is removed the balance point shifts to 40 cm. The value of $R_1$ is (in ohm)

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• 100 cells each of e.m.f. 5 V and internal resistance 1 ohm are to be arranged so as to produce maximum current in a 25 ohms resistance. Each row is to contain equal number of cells. The number of rows should be

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