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A coil of area 10cm^2 and 10 turns is in...

A coil of area `10cm^2` and 10 turns is in magnetic field directed perpendicular to the plane and changing at a rate of `10^8 gauss//s`. The resistance of coil is `20Omega`. The current in the coil will be

A

`0.5 A`

B

`5A`

C

`50 A`

D

`5 xx 10^(8)A`

Text Solution

Verified by Experts

The correct Answer is:
B

`i = (1)/(R )NA.(dB)/(dt) = (1)/(20) xx 10 xx 10^(-3) xx 10^(4)`
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Knowledge Check

  • In a coil of area 10cm^(2) and 10 turns, magnetic field is directed perpendicular to the plane and is changing at a rate of 10^(4)Ts^(-1) . The resistance of the coil is 20Omega . The current in the coil will be

    A
    0.5 A
    B
    0.20833333333333
    C
    5 A
    D
    `5xx10^(8)A`
  • A rectangular coil of 20 turns and area of cross - section 25 sq. cm has a resistance of 100 Omega . If a magnetic field which is perpendicular to the plane of coil changes at a rate of 1000 tesla per second, the current in the coil is

    A
    `1A`
    B
    50 A
    C
    0.5 A
    D
    `5A`
  • A rectangular coil of 20 turns and area of cross-section 25 cm^(2) has a resistance of 100 ohm . If a magnetic field which is perpendicular to the plane of the coil changes at the rate of 1000 telsa per second, the current in the coil is

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