Q. Heat produced (cals) in a resistance $R$ when a current $I$ amperes flows through it for $t$ seconds is given by the expression
A) $\frac{I^{2}Rt}{4.2}$
B) $\frac{IR^{2}t}{4.2}$
C) $\frac{4.2IR}{t^{2}}$
D) $\frac{IRt^{2}}{4.2}$
Explanation
(a) $H = \frac{I^{2}Rt}{J} = \frac{I^{2}Rt}{4.2}\ cal$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.