Question

A metal block is placed in a non-uniform magnetic field, whose magnitude is steadily increasing with time. The direction of eddy currents induced in the block, as seen from above, will be

• A. Clockwise
• B. Counter-clockwise
• C. First clockwise and then counter-clockwise
• D. First counter-clockwise and then clockwise

Answer 1

The correct option is A Clockwise

When the magnitude of magnetic field increases, the magnetic flux through the block also increases.

Due to this, eddy currents will be induced in the block.

According to Lenz's law, the circular induced eddy currents will try to oppose the increase in magnetic flux.

Therefore, the magnetic field due to induced current should be in the opposite direction of applied field.

So, the induced current will be in clockwise direction, as seen from above the block.


Hence, option $\left(A\right)$ is the correct answer.