Question

A wire of resistance 5 ohm is drawn out so that its Length is increased by twice its original length. Calculate its new resistance.​

Answer 1

Answer:

Refer to the picture below:

Explanation:

Answer 2

Explanation:

According to the question

resistance = R = 5ohm

length = L

the new resistance = R'

and the new length = 2L'

as we know that R is directly proportional to L

R'/R = 2L/L

R'/R = 2/1

R' = 2R

R' = 10ohm