NEET Physics Bar Magnet MCQ Question
Consider a diagram showing a short bar magnet placed with its axis perpendicular to the earth's magnetic field direction. If the magnetic field lines of the bar magnet are depicted, what can be inferred about the magnetic field strength at a point on its normal bisector, where the resultant field is inclined at 45° to the earth's field?
The magnetic field strength of the bar magnet equals the earth's field strength at that point.
The magnetic field strength of the bar magnet is greater than the earth's field strength at that point.
The magnetic field strength of the bar magnet is less than the earth's field strength at that point.
The magnetic field strength of the bar magnet is zero at that point.
Correct Answer
Detailed Explanation
At the point where the resultant field is inclined at 45° to the earth's field, the magnetic field strength of the bar magnet equals the earth's field strength, creating a right triangle where the sides are equal.
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