The pole strength of a bar magnet of magnetic moment 5`Am^(2)` and geometric length 6 cm is
The pole strength of a bar magnet of magnetic moment 5`Am^(2)` and geometric length 6 cm is
A. `10AM`
B. 100 Am
C. 1000 Am
D. `1AM`
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Correct Answer - B
`2l=(5)/(6)xx6=5cm
therefore M=2lm`,
`m=(M)/(2l)=(5)/(5xx10^(-2))=100 Am`
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