NEET Physics Magnetic Force on Current MCQ Question
Consider a straight current-carrying wire placed vertically. A magnetic compass needle is placed near the wire. Which of the following best describes the alignment of the compass needle due to the magnetic field created by the current?
The needle aligns tangentially to a circle centered on the wire.
The needle aligns parallel to the wire.
The needle aligns perpendicular to the wire.
The needle does not deflect at all.
Correct Answer
Detailed Explanation
Hans Christian Oersted discovered that a current in a straight wire causes a nearby magnetic compass needle to align tangentially to an imaginary circle centered on the wire with its plane perpendicular to the wire.
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