Question #10563

The resistance of aluminium wire of 2 meter length is 7 ohm.What will be the resistance of wire of 8 metre length and of same cross - section area

Expert's answer

R = p · l / A

p2 = p1, A2 = A1, l2 = 4 · l1

So, R2 = 4 · R1 = 4 · 7 = 28

Ohm.

p2 = p1, A2 = A1, l2 = 4 · l1

So, R2 = 4 · R1 = 4 · 7 = 28

Ohm.

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