If a current of I A flows along an infinitely long straight tube of radius R, the magnetic induction at any point inside the tube at a distance r from the axis of the tube (r < R) is:

0 $\infty$ $\frac{\mu_0 I}{2 r}$ $\frac{\mu_0 I}{2 \pi r}$

0

The correct answer is Option (1) → 0