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The wire shown in figure carries a cur...

The wire shown in figure
carries a current of 40A. The radius of the circular part of the wire is 2 cm. Find the magnetic field at the centre of the circular part of the wire.

A

`9.43 xx 10^-4 T`

B

`9.43 xx 10^-6 T`

C

`4.93 xx 10^-4 T`

D

`6 xx 10^-6 T`.

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