Question

. A copper wire has diameter 0.5 mm and resistivity of 1.6 x 10-8 m. What will be the length of this wire to make its resistance 10? How much does the resistance change if the diameter is doubled?​

Answer 1

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A copper wire has diameter 0.5 mm and resistivity of 1.6 x 10-8 m. What will be the length of this wire to make its resistance 10? How much does the resistance change if the diameter is doubled?

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answer is in the attachment