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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

`1.57 xx 10^(-5) Wb//m^(2)`

B

`8.0 xx 10^(-5) Wb//m^(2)`

C

`2.5 xx 10^(-5) Wb//m^(2)`

D

`3.14 xx 10^(-5) Wb//m^(2)`

Text Solution

Verified by Experts

The correct Answer is:
B
As ` B = (mu_(0))/(4pi) , (2pi l)/(r ) = (10^(-7) xx 2pi xx2)/(0.0157) = B xx 10^(-5) Wb//m^(2)`
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