Is it true that the direction of deflection of the north pole of a compass needle kept at a given point near the conductor remains unaffected even when the terminals of the battery of wire are interchanged?

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True

False

answer is B.

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Detailed Solution

The above statement is False.
When the direction of current flowing through the conductor is reversed, the deflection of the magnetic needle also gets reversed. A conductor carrying current produces a magnetic field around the conductor. The magnetic field produced by the current-carrying conductor deflects the compass's needle. When the terminals of the battery sending current in the wire are interchanged, the direction of the magnetic field is also interchanged. Hence, the deflection of the compass needle also changes.
The correct statement is when the current flow direction through the conductor is changed. The magnetic needle gets deflected.

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