MCQ
When current passes through the circuit a compass needle rests in which direction $($with respect to the Earth$)$?
- ✓South $-$ north
- BNorth $-$ south
- CEast $-$ west
- DWest $-$ east
✓
Answer
Correct option: A.
South $-$ north
The earth acts like a huge magnet. Thus in the absence of electric current a compass needle always comes to rest in Earths North $-$ south direction.
However, when current passes through the circuit the needle comes to rests in the direction opposite to the magnetic field of Earth i.e. South$-$North direction.
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