Chapter - 4 Electric Current and Its Effects

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Q
Electric Current and Its Effect

Question:

Will the compass needle show deflection when the switch in the circuit shown by Fig.14.24 is closed?

Answer:

When the switch in the circuit is in the closed position, no current will flow in the circuit because the circuit is not complete. So, there will be no magnetic field in the wire. Hence, there will be no deflection in the compass needle.


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