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The magnetic moment produced in a substa...

The magnetic moment produced in a substance of `1 gm is 6xx10^(-7) "ampere","metre"^(2)`. If its density is `5 gm//cm^(3)`, then the intensity of magnetisation in `A//m` will be

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The correct Answer is:
B
Intensity of magnetisatoin,
`" " I=(M)/(V)=-(Mg)/("mass/density")`
`Given, mass=1g=10^(-3)kg`
`and , density=5g//cm^(3)=(5xx10^(-3)kg)/((10^(-2))^(-3))=5xx10^(3)k//m^(3)`
`Hence, I=(6xx10^(-7)xx5xx10^(3))/(10^(-3))=-3A//m`
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