Q. The amount of work, which can be obtained by supplying $200\ cal$ of heat, is
A) $840\ dyne$
B) $840\ W$
C) $840\ erg$
D) $840\ J$
Explanation
(d) $W = JQ \Rightarrow W = 4.2 \times 200 = 840\ J$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.