A steel wire` 4.0m` in length is stretched through `2.0mm`.The cross -sectional area
Channel: Doubtnut
Date: 2020-07-12

A steel wire` 4.0m` in length is stretched through `2.0mm`.The cross -sectional area of the wire is `2.0 mm^(2)`.If young's modulus of steel is  `2.0xx10^(11) N//m^(2)`  (a) the enrgy density of wire,  (b) the elastic potential energy stored in the wire.