NEET Physics Bar Magnet Assertion Reason Question
Assertion (A): A bar magnet aligned along the north-south direction in a horizontal plane will have null points on its axis at specific distances. | Reason (R): At null points, the magnetic field due to the bar magnet is equal and opposite to the horizontal component of the earth’s magnetic field.
Both A and R are true and R is the correct explanation of A.
Both A and R are true but R is not the correct explanation of A.
A is true but R is false.
A is false.
Correct Answer
Detailed Explanation
The NCERT context states that null points occur where the magnetic field of the bar magnet is equal and opposite to the earth's horizontal magnetic component, supporting both A and R.
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