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At a distance of 10 cm from a long strai...

At a distance of `10 cm` from a long straight wire carrying current, the magnetic field is `0.04 T`. At the distance of `40 cm`, the magnetic field will be

A

`0.01 T`

B

`0.02 T

C

`0.08 T`

D

`0.16 T`

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The correct Answer is:
A
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