Question

A straight conducting wire is placed parallel to and over compass needle. The deflection in the needle
a) becomes opposite when the direction of current is reveresed
b) remains in the same direction even on reversing the direction of current
c) keeps fluctuating on passage of current in any direction
d) is negligible on reversing the direction of current

Answer 1

Answer:

Magnetic compass needle shows deflection in the direction of magnetic field lines. We know that the points A and B has magnetic field lines in opposite direction, thus the needle of the compass will deflect in the opposite direction.

Explanation:

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