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Wires A and B are made from the same mat...

Wires `A` and `B` are made from the same material. `A` has twice the diameter and three times the length of `B`. If the elastic limits are not reached, when each is stretched by the same tension, the ratio of energy stored in `A` to that in `B` is

A

`2:3`

B

`3:4`

C

`3:2`

D

`6:1`

Text Solution

Verified by Experts

The correct Answer is:
C
(c) Energy stored, `U=(1)/(2)xx(Yal^(2))/(L)`
`=(1)/(2)xx(2xx10^(11)xx3xx10^(-6)xx(1-10^(-3))^(2))/(4)`
0.075 Joule
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