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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

A

`8.3xx10^(6)`

B

`3.0`

C

`1.2xx10^(-7)`

D

`3 xx 10^(-6)`

Text Solution

Verified by Experts

The correct Answer is:
B
Intensity of magnetisation , `l=(M)/V=-(M)/("mass/density")`
Given , mass =1 g =`10^(-3)kg ` and density ` =5g//cm^(3)=(5 xx 10^(-3)kg)/((10^(-2))^(3))=5 xx 10^(3) kg m^(-3)`
Hence , `l=( 6xx 10^(-7) xx 5 xx 10^(3))/( 10^(-3))=3Am^(-1)`
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Knowledge Check

  • The magnetic moment produced in a substance of 1 g is 6 xx 10^(7) Am^(2) . If its density is 5 g//cm^(3) , then the intensiyt of magnetisation (in A/m) will be:

    A
    `1.3 xx 10^(6)`
    B
    3
    C
    `1.2 xx 10^(-7)`
    D
    `3 xx 10^(-6)`

  • the magnetic moment produced in a substance of 1 g is 6 xx 10(-7) A-m^2 . If its density is 5 g/km^2 , then the intensity of magnetisation in A/m will be

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    C
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  • the magnetic moment produced in a substance of 1 g is 6 xx 10(-7) A-m^2 . If its density is 5 g/km^2 , then the intensity of magnetisation in A/m will be

    A
    `8.3 xx 10^6`
    B
    `3.0`
    C
    `1.2 xx 10^(-7)`
    D
    `3 xx 10(-6)`

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