One student cuts a magnet of magnetic moment M, into two identical parts perpendicular to its length. The magnetic moment of each part will be
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → M/2
When a magnet is cut perpendicular to its length, the pole strength $m$ remains the same, but the length $l$ is halved.
Magnetic moment $M = m \cdot l$
For each half: $M' = m \cdot \frac{l}{2} = \frac{M}{2}$
Magnetic moment of each part = M/2