Magnetism Question 287
Question: A permanent magnet in the shape of a thin cylinder of length 10 cm has magnetisation (M) $ =10^{6},A,{{m}^{-1}} $ . Its magnetization current $ I _{M} $ is
Options:
A) $ 10^{5},A $
B) $ 10^{6},A $
C) $ 10^{7},A $
D) $ 10^{8},A $
Show Answer
Answer:
Correct Answer: A
Solution:
[a] As $ BI={\mu _{0}}MI _{M}={\mu _{0}}(I+I _{M}) $ Here, $ I=0 $ Then $ {\mu _{0}}MI={\mu _{0}}(I _{M})\Rightarrow I _{M}=MI=10^{6}\times 0.1={{10}^{+5}},A $
BETA
