Q

An experiment uses a compass near a straight current-carrying wire. What does the compass needle indicate?

RRB Group D 17 Aug, 2026 (12:45 PM - 2:15 PM) 2026
✓ Answer: B The compass needle aligns tangentially to the magnetic field circle around the wire
The correct choice is The compass needle aligns tangentially to the magnetic field circle around the wire. The result follows from the relevant magnetic-field, electromagnetic-induction or Fleming/right-hand-rule principle.
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