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The unit of pole strength is :...

The unit of pole strength is :

A

Am

B

`Am^-1`

C

`Am^-2`

D

`Am^2`.

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Give the SI unit of pole strength.

A U-magnet of pole strength 100 Am has its poles separated by 5 xx 10^-2 m . At mid point of line joining the poles the force on unit north pole is :

Knowledge Check

  • A long magnet is cut into two parts in such a way that the ratio of hteir lengths is 2:1 the ratio of pole strengths of both the section is

    A
    `equal dip`
    B
    `2:1`
    C
    `1:2`
    D
    `4:1`

  • A bar magnet of pole strength in divided in to four equal parts so that the length as well as breadth of eath part is half of its original magnet The pole strenght of each is

    A
    `(m)/(4)`
    B
    `(m)/(8)`
    C
    `(m)/(2)`
    D
    4m

  • A bar magnet of pole strength in divided in to four equal parts so that the length as well as breadth of eath part is half of its original magnet The dipole moment of each is

    A
    m
    B
    `(m)/(2)`
    C
    `(m)/(4)`
    D
    `(m)/(8)`

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