Question

A wire is stretched so that its length becomes 5 times of its original length. If its original

resistance is 25 Ω, find its new resistance.​

Answer 1

Answer:

resistance is directly proportional to length of wire.

when length becomes 5 times then resistance will also be 5 times so resistance=5×25=125

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Answer 2

Answer:

Hi,

Here is answer for your question,

The new resistance of the wire is 125ohm

Explanation:

Given,

Original Resistance=25ohm

Let,

Original length=x

New length=5x

As,

Resistance is directly proportional to length,

R1/R2=L1/L2

25/R2=x/5x

R2=25×5x/x

R2=125

Therefore,

The new resistance of the wire is 125ohm

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