Q. A battery of $e.m.f.\ 10\ V$ and internal resistance $0.5\ ohm$ is connected across a variable resistance $R.$ The value of $R$ for which the power delivered in it is maximum is given by
A) $2.0\ ohm$
B) $0.25\ ohm$
C) $1.0\ ohm$
D) $0.5\ ohm$
Explanation
(d) For maximum power $r = R$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.