Q. The magnetic field $B$ with in the solenoid having $n$ turns per metre length and carrying a current of $i\ ampere$ is given by
A) $\frac{\mu_{0}ni}{e}$
B) $\mu_{0}ni$
C) $4\pi\mu_{0}ni$
D) $ni$
Explanation
(b) Magnetic field inside the solenoid $B_{in} = \mu_{0}ni$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.