Magnetism Question 156
Question: Magnetic intensity for an axial point due to a short bar magnet of magnetic moment M is given by
[MP PET 1984; CPMT 1974; Pb. PMT 1999]
Options:
A) $ \frac{{\mu _{0}}}{4\pi }\times \frac{M}{d^{3}} $
B) $ \frac{{\mu _{0}}}{4\pi }\times \frac{M}{d^{2}} $
C) $ \frac{{\mu _{0}}}{2\pi }\times \frac{M}{d^{3}} $
D) $ \frac{{\mu _{0}}}{2\pi }\times \frac{M}{d^{2}} $
Show Answer
Answer:
Correct Answer: C
Solution:
$ B _{a}=\frac{{\mu _{0}}}{4\pi }\frac{2M}{d^{3}}=\frac{{\mu _{0}}}{2\pi }\frac{M}{d^{3}} $
BETA
