Question

An infinitely long cylinder is kept parallel to an uniform magnetic field B directed along positive Z-axis. This direction of induced current as seen from the Z-axis will be

• A. clockwise of the positive Z-axis
• B. anti-clockwise of the positive Z-axis
• C. zero
• D. along the magnetic field

Answer 1

The correct option is C

zero

Explanation for the correct option(s):

C: Zero

• The long cylinder is kept in a uniform magnetic field, the change in magnetic flux is zero.
• Therefore, induced current will be zero.

Explanation for the incorrect option(s):

A: clockwise of the positive Z-axis

B: anti-clockwise of the positive Z-axis

C: along the magnetic field

• Current can be induced only when there is a change in the magnetic flux linked with the cylinder.
• Here, neither the cylinder is moving not the magnetic field is varying. So, no current can be induced.

Hence. Option C is correct.