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A rectangular coil of wire of area 400cm...

A rectangular coil of wire of area `400cm^(2)` contain `500` turns. It is places in a magnetic field of induction `4xx10^(-3)T` and it makes an angle `60^(@)` with the field. A current of `0.2A` is passed through is. The torque on the coil is

A

`8 sqrt3 xx 10^(-3) Nm`

B

`8 xx 10^(-3) Nm`

C

`8 sqrt3 xx 10^(-4) Nm`

D

`8 xx 10^(-4) Nm`

Text Solution

Verified by Experts

The correct Answer is:
B
`tau = BAIN cos theta `
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Knowledge Check

  • A coil of area 100cm^(2) having 500 turns carries a current of 1mA . It is suspended in a uniform magnetic field of induction 10^(-3)wb//m^(2) . Its plane makes an angle fo 60^(@) with the lines of induction. The torque acting on the coil is

    A
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    B
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    D
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  • A coil of area 5cm^(2) and having 20 turns is placed in a uniform magnetic field of 10^(3) gauss. The normal to the plane of the coil makes an angle of 60^(@) with the magnetic field. The flux in Maxwell through the coil is:

    A
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  • A rectangular coil of turns, each of area 20 cm^(2) is suspended freely in a uniform magnetic field of induction 6 xx 10^(-2)Wb//m^(2) ,with its plane inclined at 60◦ with the field. What is the magnitude of the torque acting on the coil, if a current of 100mA is passed through it?

    A
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    B
    `8 xx 10^(-5)N-m`
    C
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    D
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