Question

A wire of resistance 4ohm is stretched To double it's length. find its new resistance​

Answer 1

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The “resistance of a wire” after stretched is 16 ohm.

Given:

Resistance of wire (r) = 4 ohm

Stretched to twice of its length.

To find:

The resistance of the wire after stretching (R) = ?

Solution:

The resistance of the wire is “directly proportional to” the square in length of wire.

So, if the length is stretched to twice then the resistance gets multiplied by four times.

R = 4r

R = 4×4

R = 16 ohm

Answer 2

Answer:

4*4=16

Explanation:

The resistance of the wire is “directly proportional to” the square in length of wire. So, if the length is stretched to twice then the resistance gets multiplied by four times.