CUET · PHYSICS · PYQ PAPER 2025
A bar magnet is cut into two equal halves along a plane parallel to the magnetic axis. The one parameter which remains unchanged is
- A intensity of magnetisation
- B magnetic moment
- C pole strength
- D Magnetic field lines
Answer & Solution
Correct Answer
(A) intensity of magnetisation
Step-by-step Solution
Detailed explanation
When cut parallel to the axis, both the magnetic moment ( \(M\) ) and the volume ( \(V\) ) are halved. Since intensity of magnetisation is the ratio \(I=M / V\), the value remains constant as both parameters decrease by the same factor. A) intensity of magnetisation.
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