Q. A coil of resistance $R\ $and inductance $L$ is connected to a battery of emf $E$ volt. The final current in the coil is
A) $\frac{E}{R}$
B) $\frac{E}{L}$
C) $\sqrt{\left( \frac{E}{R^{2} + L^{2}} \right)}$
D) $\sqrt{\left( \frac{EL}{R^{2} + L^{2}} \right)}$
Explanation
(a) Final current in constant and L plays no role at that instant. Therefore, $i = E/R$.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.