Q. For driving a current of $2\ A$ for $6\ minutes$ in a circuit, $1000\ J$ of work is to be done. The e.m.f. of the source in the circuit is
A) $1.38\ V$
B) $1.68\ V$
C) $2.04\ V$
D) $3.10\ V$
Explanation
(a) $P = \frac{W}{t} = Vi \Rightarrow V = \frac{W}{it} = \frac{1000}{2 \times 6 \times 60} = 1.38\ V$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.