Question

Will the compass needle show deflection when the switch in the circuit shown by figure is closed?

Answer 1

no the compass needle do not show deflection because there is no source of current if we not attach the switch

Answer 2

The compass needle will not show deflection when the switch in the circuit is closed because of the following reasons :

1- The given circuit will not have any kind of current source.

2- In the absence of current, the wire will never behave as a magnet and hence , the compass needle will not show any kind of deflection in the circuit.