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Byju's Answer

Standard XII

Physics

Magnetic Field Due to a Straight Long Wire

A coil carryi...

Question

A coil carrying a heavy current and having large number of turns is mounted in a N-S vertical plane. A current flows in the clockwise direction. A small magnetic needle at its centre will have its north pole in

east-north direction

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west-north direction

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east-south direction

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west-south direction

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Solution

The correct option is B west-north direction
When the plane of coil is in N-S vertical plane and current is passed in clockwise direction, the magnetic field at the centre of coil due to current is directed East to West. Earth's magnetic field is south to North.
Since the magnetic needle will be in the direction of resultant magnetic field, which will be in the west-north direction.

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