State three factors on which the resistance of a wire depends. Explain how does the resistance depend on the factors stated by you.

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Solution

Resistance of a wire depends upon:

Length of wire: Resistance is directly proportional to the length of a wire.

Area of a cross-section of wire: Resistance is inversely proportional to the area of cross-section the wire.

The temperature of the wire: Resistance of a wire is directly proportional to the temperature of the wire.

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