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A 6.28m long wire is turned into a coil ...

A 6.28m long wire is turned into a coil of diameter 0.2m and a current of 1 amp is passed in it. The magnetic induction at its centre will be -

A

`6.28 xx 10^(-5) T`

B

`0 T`

C

`6.28 T`

D

`6.28 xx 10^(-3) T`

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