Question
Physics Question on Moving charges and magnetism
A bar magnet of moment M is bent into are, its moment
A
decreases
B
increases
C
does not change
D
may change
Answer
decreases
Explanation
Solution
Magnetic moment of a magnet =ml where, m= pole strength l= effective distance between the two poles When it the magnet is bent in arc, the effective distance between the two poles decreases and so the Magnetic Moment.