There are two coils A and B as shown in Fig.

Options

A. When switch S is closed, the direction of the momentary current induced in coil B will be in anticlockwise direction
B. When switch S is closed, the direction of the momentary current induced in coil B will be in clockwise direction.
C. When switch S is opened, the direction of the momentary induced current in coil B will be in clockwise direction
D. When switch S is opened, the direction of the momentary induced current in coil B will be in anticlockwise direction.

Answer

A, C

Explanation

According to Lenz's law, current in coil A grows in clockwise direction (when switch S is closed). This causes increases in magnetic flux linking the coil B in clockwise direction. Therefore, current is induced in coil B in anticlockwise direction. Similarl, when switch is opened, magnetic flux linked with coil B decreases. The direction of induced current in coil B will be clockwise.