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A circular loop of radius 0.0157m carrie...

A circular loop of radius `0.0157m` carries a current of 2.0 amp. The magnetic field at the centre of the loop is
`(mu_(0)=4pixx10^(-7)"weber"//amp-m)`

A

`1.57xx10^(-5)"weber"//m^(2)`

B

`8.0xx10^(-5)"weber"//m^(2)`

C

`2.5xx10^(-5)"weber"//m^(2)`

D

`3.14xx10^(-5)"weber"//m^(2)`

Text Solution

Verified by Experts

The correct Answer is:
B
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Knowledge Check

  • A circular loop of radius 0.0157 m carriesa current of 2.0 A. The magnetic field at the centre of the loop is

    A
    `1.57xx10^(-5)Wb//m^(2)`
    B
    `8.0xx10^(-6)Wb//m^(2)`
    C
    `2.5xx10^(-5)Wb//m^(2)`
    D
    `3.14xx10^(-5)Wb//m^(2)`

  • A circular loop of radius 0.05 m carries a current of 1.0 A. The magnetic moment of the loop is .

    A
    `1.32xx10^(-4)A-m^(2)`
    B
    `7.85xx10^(-4)A-m^(2)`
    C
    `2.62xx10^(-4)A-m^(2)`
    D
    `5.25xx10^(-4)A-m^(2)`

  • A circular loop of radius0.05 m carriess a current of 1.0 A. The magnetic moment of the loop is .

    A
    `1.32 xx 10^(-4) A- m^(2)`
    B
    `7.85 xx 10^(-4) A - m^(2)`
    C
    `2.62 xx 10^(-4) A - m^(2)`
    D
    `525 xx 10^(-4) A - m^(2)`

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