Question

Work done by restoring force in a string within elastic limit is $-10J$. The maximum amount of heat produced in the string is :

• A. $10J$
• B. $20J$
• C. $5J$
• D. $15J$

Answer 1

The correct option is A $10J$

$\begin{array}{c}\text{Given, work done by restoring force}\\ \text{within elastic limit is}-10J\text{.}\\ \text{Now, on removing the load, the string}\\ \text{regains its natural length but}\\ \text{in this, process releases a part}\\ \text{of the work in the form of heat.}\\ \text{Hence, maximum amount of heat produced}\\ \text{in the string is l0 J.}\end{array}$