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The earth's magnetic induction at a cert...

The earth's magnetic induction at a certain point is `7xx10^(-5) Wb/m^(2)`. This is to be annulled by the magnetic induction at the centre of a circular conducting loop of radius `5 cm`. The required current in the loop is

A

`0.56A`

B

`5.6A`

C

`0.28A`

D

`2.8A`

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The correct Answer is:
B
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