Question

What will be the direction of current in the coil $A$ as the switch $S$ is closed?

• A. Clockwise
• B. Anticlockwise
• C. Anticlockwise and then clockwise
• D. Clockwise and then anticlockwise

Answer 1

The correct option is A Clockwise

As shown in the above picture current is induced in such a direction that magnetic field induced by such induced current will counter the increasing magnetic field in opposite direction. In our circuit magnetic field will increase and direction will be out of plane in $+Z$ direction hence current will induce to counter it and produce magnetic field in opposite direction i.e $-Z$ direction. If magnetic field is in $-Z$drection then current will be clockwise.