Physics-(general)
NEET Physics (general) MCQ Question
Type: MCQ-numerical-Medium-Class 12
Consider two identical magnetised needles P and Q, placed at a point O as described in Example 5.5. If the magnetic moment of needle Q is reversed, what happens to the potential energy of the system?
A
The potential energy increases.
B
The potential energy decreases.
C
The potential energy remains the same.
D
The potential energy becomes zero.
Correct Answer
Option A
Detailed Explanation
Reversing the magnetic moment of Q will increase the potential energy as the alignment will be opposite, leading to an unstable configuration.
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