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A current i is flowing in a conductor PQ...

A current i is flowing in a conductor PQRST shaped as shown in the figure. The radius of curved part QRS is r and length of straight portions PQ and ST is very large. The magnetic field at the centre O of the curved part is -

A

`3/2`

B

`3/8`

C

`9/2`

D

`9/8`

Text Solution

Verified by Experts

The correct Answer is:
B
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