Current Electricity

Related Questions

• In the given figure, battery E is balanced on 55 cm length of potentiometer wire but when a resistance of 10 $\Omega$ is connected in parallel with the battery then it balances on 50 cm length of the potentiometer wire then internal resistance r of the battery is

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• If the resistance of a conductor is $5 \Omega$ at $50^oC$ and $7 \Omega$ at $100^oC$ then the mean temperature coefficient of resistance of the material is

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

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• Constantan wire is used in making standard resistances because its

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• When a wire of uniform cross-section a, length l and resistance R is bent into a complete circle, resistance between any two of diametrically opposite points will be

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