Q. The resistor of resistance $R$ is connected to 25 V supply and heat produced in it is $25\ {Js}^{- 1}.$ The value of $R$ is
A) $225\ \Omega$
B) $1\ \Omega$
C) $25\ \Omega$
D) $50\ \Omega$
Explanation
(c) $H = \frac{V^{2}}{R}$
$\Rightarrow R = \frac{V^{2}}{H}$
$\ \ \ \ \ \ \ \ \ = \frac{(25)^{2}}{25} = 25\ \Omega$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.