Question

An electron moves on a straight line path $\text{XY}$ as shown in the figure. The $\text{abcd}$ is a loop adjacent to the path of electron. What will be the direction of induced current, if any, induced in the loop?

• A. $\text{adcb}$
• B. The current will reverse its direction as the electron goes past the loop
• C. No current is induced
• D. $\text{abcd}$

Answer 1

The correct option is B The current will reverse its direction as the electron goes past the loop


The direction of current due to the motion of the electron will be $\text{YX}$.

As the electron approaches the loop, the inward magnetic flux through the loop increases. Therefore, by Lenz's law, induced current will be in $\text{abcd}$.

Similarly, the induced current will be in $\text{adcb}$ as the electron moves away from the loop.

Hence, the current will reverse its direction as the electron goes past the loop.