A current i ampere flows along an infinitely long straight thin walled tube, then the magnetic induction at any point inside the tube is

Question

A current i ampere flows along an infinitely long straight thin walled tube, then the magnetic induction at any point inside the tube is (A) infinite (B) zero (C) (μo/4π) (2i/r) tesla (D) (2i/r) tesla

Tardigrade Admin · Accepted Answer

Considering Ampere’s loop (shown by dotted line), no current is enclosed by this loop. Therefore, the magnetic field will be zero inside the tube.

Q. A current $i$ ampere flows along an infinitely long straight thin walled tube, then the magnetic induction at any point inside the tube is

infinite

zero

$\frac{μ _{o}}{4 π} \frac{2 i}{r}$ tesla

$\frac{2 i}{r}$ tesla

Considering Ampere’s loop (shown by dotted line), no current is enclosed by this loop. Therefore, the magnetic field will be zero inside the tube.

Q. A current i ampere flows along an infinitely long straight thin walled tube, then the magnetic induction at any point inside the tube is

infinite

zero

4πμo​​r2i​ tesla

r2i​ tesla

Considering Ampere’s loop (shown by dotted line), no current is enclosed by this loop. Therefore, the magnetic field will be zero inside the tube.

Q. A current $i$ ampere flows along an infinitely long straight thin walled tube, then the magnetic induction at any point inside the tube is

$\frac{μ _{o}}{4 π} \frac{2 i}{r}$ tesla

$\frac{2 i}{r}$ tesla