27-11-2019
Physics

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04-12-2019

Answer:

The magnetic compass shows no deflection.

Explanation:

When a magnetic compass is placed on a current-carrying conductor, the compass needle shows deflection.
When the direction of the current is reversed, the needle deflects in the opposite direction.
This is due to the fact that the current-carrying conductor generates a magnetic field around it.
If the direction of the current is reversed, the magnetic polarization changes.
This phenomenon was first noticed by Oersted, and later it helped to develop electromagnetism.

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