Q. A long copper tube of inner radius $R$ carries a current $i$. The magnetic field $B$ inside the tube is
A) $\frac{\mu_{0}i}{2\pi R}$
B) $\frac{\mu_{0}i}{4\pi R}$
C) $\frac{\mu_{0}i}{2R}$
D) Zero
Explanation
(d) Magnetic field inside the hollow conductor (tube) is zero
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.