Q. In a closed insulated container, a liquid is stirred with a paddle to increase its temperature. In this process, which of the following is true
A) $\mathrm{\Delta}E = W \neq 0,\ Q = 0$
B) $\mathrm{\Delta}E \neq 0,\ Q = W = 0$
C) $\mathrm{\Delta}E = W = \ Q = 0$
D) $\mathrm{\Delta}E = 0,\ Q \neq 0,\ W = 0$
Explanation
(a)
As the system is closed and insulated, no heat enter or leave the system, $ie,\ q = 0$
$\therefore\mathrm{\Delta}E = q + W = W$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.