Current Electricity

Related Questions

• The length of a wire of a potentiometer is 100 cm, and the emf of its standard cell is E volt. It is employed to measure the e.m.f of a battery whose internal resistance is 0.5 $\Omega$. If the balance point is obtained at l = 30 cm from the positive end, the e.m.f. of the battery is

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• An infinite sequence of resistance is shown in the figure. The resultant resistance between A and B will be, when ${R_1} = 1\,ohm$ and ${R_2} = 2\,ohm$

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• If an electric current is passed through a nerve of a man, then man

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• 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

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• Two batteries, one of emf 18 volts and internal resistance $2\Omega $ and the other of emf 12 volt and internal resistance $1\Omega $, are connected as shown. The voltmeter $V$ will record a reading of

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