Question

Calculate the pole stringth of bar magnet having magnetic length 12 cm and magnetic moment 60 Am²

Answer 1

Answer:

qm, magnetic pole strength = 200mA-m

⇒200×10

−3

A−m

2

l

; length of magnet directed from S-pole to N-pole = 12cm

⇒ 0.12m

Magnetic dipolemoment;

m

=qm×2

l

⇒200×10

−3

×0.12A−m

2

⇒0.2×0.12Am

2

⇒0.024Am

2

.