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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