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A current I flowing through the loop as ...

A current I flowing through the loop as shown in figure. The magnetic field at centre O is

A

`(7mu_(0) I)/(16 R) "" otimes`

B

`(7 mu_(0) I)/(16 R) "" opoint`

C

`(5 mu_(0) I)/(16 R) "" otimes `

D

`(5 mu_(0)I)/(16 R) "" opoint`

Text Solution

Verified by Experts

The correct Answer is:
A
`B = B_(EP) + B_(RS)` (into the paper )
`= (mu_(0))/(4pi) xx (3 pi I)/(2R) + (mu_(0))/(4pi) xx (pi)/(2) xx (I)/(2 R) = (7)/(16) (mu_(0) I)/( R)`
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