The magnetic field due to a current carr...

The magnetic field due to a current carrying loop of radius ` 3 cm` at a point on the axis at a distance of `4 cm` from the centre is ` 54 muT`. What will be its value at the centre of loop ?

A

`250 muT`

B

`150 muT`

C

`125 muT`

D

`75 muT`

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A

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