Q. A bar magnet is cut into two equal halves by a plane parallel to the magnetic axis. Of the following physical quantities, the one which remains unchanged is
A) Pole strengths
B) Magnetic moment
C) Intensity of magnetization
D) Moment of inertia
Explanation
(c) For each half pole strength $m$ becomes half
$M = m \times 21$becomes half and volume $V = a \times 2l$ also becomes half therefore,$I = W/V$, remains constant.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.