Question
Look at the figure given below and answer whether the compass needle will show deflection or not when the switch in the circuit shown is closed? 
✓
Answer
The compass needle will not show any deflection when the switch in the circuit shown by above figure is closed, because there is no power source like cells in the circuit hence there will be no electric current flow in the circuit. In the absence of electric current there will be no magnetic effect to cause the deflection of compass needle.
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