Physics, asked by fuggii, 1 year ago

A copper wire has a diameter of 0.5 millimetre and resistivity of 1.6 × 10-8 ohm metre. what will be the length of the wire to make its resistance 10 ohm? how much does it resistance change if the diameter is doubled

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Answered by sarah92

4

Answer:

Thus, on doubling the diameter, the area of cross-section becomes 4 times and the resistance becomes one-fourth.

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