Question

24. A copper wire has diameter 0.5 mm and resistivity 1.6 x 10-12 m. what will be the
length of this wire to make its resistance 102 ? How much does the resistance change
if the diameter is doubled?​

Answer 1

Answer:

when the diameter is doubled ,then the resistance R becomes one - fourth of its original value

Step-by-step explanation:

solve it with the formula

R =p(rhaw)l/A.

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