Question

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Answer 1

Answer:

R=rho×length/area here length increase but if we increase lentgh of same wire area also affected so new formula for this is R1/R2= (L1/L2)^2 then 1.7×10^-8/R2= 2×2/4×4 ,, then R2 = 1.7×4× 10^-8,, R2 is 6.8×10-8ohm ans

Answer 2

Answer:

3.4× 10^ -16

Explanation:

NEW RESISTIVITY OF THE COPPER WIRE IS

3.4× 10^ -16

HOPE IT HELPS YOU