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A thin wire of length l is carrying a co...

A thin wire of length `l` is carrying a constant current. The wire is bent to form a circular coil. If radius of the coil, thus formed, is equal to R and number of turns in it is equal to `n`, then which of the following graphs represent (s) variation of magnetic field induction (B) at centre of the coil

A

B

C

D

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The correct Answer is:
B, C
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