Q. If amount of heat given to a system be 50 J and work done on the system be 15 J, then change in internal energy of the system is
A) 35 J
B) 50 J
C) 65 J
D) 15 J
Explanation
(c) Here $dQ = 50\ J,\ dW = - 15\ J$
$dU = dQ - dW = 50 - ( - 15) = 65\ J$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.