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A 250-turns recantagular coil of length...

A 250-turns recantagular coil of length 2.1 cm and width 1.25 cm carries a current of `85 muA` and subjected to magnetic field of strength `0.85 T`. Work done for rotating the coil by `180^(@)` against the torque is

A

`9.1muJ`

B

`4.55muJ`

C

`2.3muJ`

D

1.5`mu`J

Text Solution

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The correct Answer is:
a
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Knowledge Check

  • A 250 turn rectangular coil of length 2.1 cm and width 1.25 cm carries a current of 85 muA and subjected to a magnetic field of strength 0.85 T. Work done for rotating the coil by 180^@ against the torque is

    A
    4.55 `mu J`
    B
    `2.3 mu J`
    C
    `1.15 mu J`
    D
    `9.1 mu j`

  • A 250 Turn rectangular coil of length 2.1cm and width 1.25cm carries a current of 85 mu A and subjected to a magnetic firld of strength 0.85 T. Work done for rotating the coil by 180^(@) against the torque is

    A
    `9.1 mu J`
    B
    `4.55 muJ`
    C
    `2.3 muJ`
    D
    `1.15muJ`

  • A 250 turn rectangular coil of length 2.1 cm and width 1.25 cm carries a current of 85 A and subjected to a magnetic field of strength 0.851. Work done for rotating the coil by 180° against the torque is:

    A
    `4.55 muJ`
    B
    `2.3 muJ`
    C
    `1.15 muJ`
    D
    `9.1 muJ`

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