Q. A $10\ \Omega$ electric heater operates on a 110V line. The rate at which heat is developed in watts is
A) 1310 W
B) 670 W
C) 810 W
D) 1210 W
Explanation
(d) The rate at which heat is developed
$H = \frac{V^{2}}{R} = \frac{(110)^{2}}{10} = 1210\ W$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.