Question

a wire of resistance 10 ohm has length of 20cm it is stretched uniformly at length of 50 cm
find its new length.

Answer 1

hey dear friend

Given
Resistance1=10ohm
Length1=20cm
Length2=50cm

To find =>Resistance2

As, R is directly proportional to L
So,
R1/R2=L1/L2

=>R1*L2/L1=R2
=>R2=50*10/20
=>R2=25

So, the new resistance is 25

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