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A rod ferromagnetic with dimensions 10 x...

A rod ferromagnetic with dimensions `10 xx 0.5 xx0.2`cm is placed in a magnetic field of strength `0.5xx 10^(4)` amp/m as a result of which a magnetic moment of 4 amp-`m^(2)` is produced in the rod.The value of magnetic induction will be

A

0.54 tesla

B

6.28 tesla

C

0.358 tesla

D

2.519 tesla

Text Solution

Verified by Experts

The correct Answer is:
B
`x_(m)=3xx10^(-4),H=4xx10^(4),H=4xx10^(4) A/m,I=?`
`I=x_(m)H`
`=3xx10^(-4)xx410^(4)`
=12A/m
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