Current Electricity

Related Questions

• Dimensions of a block are $1\,cm \times 1\,cm \times 100\,cm$. If specific resistance of its material is $3 \times {10^{ - 7}}ohm - m$, then the resistance between the square faces is

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• Electric power is transmitted over long distances through conducting wires at high voltage because

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• The resistivity of iron is $1 \times {10^{ - 7}}\,ohm - m$. The resistance of a iron wire of particular length and thickness is 1 ohm. If the length and the diameter of wire both are doubled, then the resistivity in $ohm - m$ will be

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• The resistance of a 5 cm long wire is 10 ohm. It is uniformly stretched so that its length becomes 20 cm. The resistance of the wire is

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• A piece of fuse wire melts when a current of 15 ampere flows through it. With this current, if it dissipates 22.5 W, the resistance of fuse wire will be

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