Suppose you cut off the part of the compass needle shown in figure (a) that is p

Question

Suppose you cut off the part of the compass needle shown in figure (a) that is painted gray. You discard this part, drill a hole in the remaining red part, and place the red part on the pivot at the center of the compass. Will the red part still swing when a current is applied as in figure (b)?

N, when the wire carries no E current, the compass needle points north I=0 When the wire carries a current, the compass needle deflects. The direction of deflection depends on the direction of the current.

Explanation / Answer

from right hand rule the direction of the current changes then direction of magnetic field also changes.

so the direction of compass depends on direction current

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