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What is the intensity of magnetisati...

What is the intensity of magnetisation of a bar magnet of length 4 cm cross sectional area 2.5 `cm^(2)` and magnetic moment 2 `Am^(2)` ?

A

`10^(5)` A/m

B

`2xx10^(5)` A/m

C

`3xx10^(5)` A/m

D

`0.5 xx10^(5)` A/m

Text Solution

Verified by Experts

The correct Answer is:
B
Volume of the magnet (V)
`=AL=2.5 xx10^(-4)xx4xx10^(-2)=10^(-5)m^(3)`
`therefore I=(M)/(V)=(2)/(10^(-5))=2xx10^(5) A/m`
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Knowledge Check

  • The magnetization of a bar magnet of length 5 cm,cross-sectional area 2 cm^(2) and magnetic moment 1 Am^(2) is

    A
    `1 xx10^(5) A/m`
    B
    `2 xx 10^(5) A/m`
    C
    `3 xx10^(5) A/m`
    D
    `4 xx 10^(5) A/m`

  • What is the magnetization of a bar magnet having length 6 cm and area of cross section 5 cm^(2) ? (M = 1 Am^(2) )

    A
    `1.2 xx 10^(-4) A//m`
    B
    `3.3 xx 10^(4) A//m`
    C
    `1.25 xx 10^(-4) A//m`
    D
    `3.3 xx 10^(-4) A//m`

  • What is the magnitude of axial field due to a bar magnet of length 3 cm at a distance of 75 cm from its mid-point if its magnetic moment is 0.6 Am?

    A
    0.013`mu` T
    B
    0.113 `mu` T
    C
    0.213 `mu` T
    D
    0.313 `mu` T

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