In the given diagram, two coils of insulated copper wire are wound over a nonconducting cylinder as shown. Coil P has larger number of turns.

A momentary deflection is shown by the galvanometer , when:

Options

A. Key K is open
B. Key K is closed
C. In both the situations
D. In neither of the case.

Answer

C

Explanation

Momentary deflection is seen in both the cases. When the key K is open, deflection is shown by the galvanometer and when it is closed, a momentary deflection is seen in opposite direction.