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A 2A current is flowing through a circular coil of radius 10 cm containing 100 turns. Find the magnetic flux density at the centre of the coil.

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Solution :
`B=N(mu_(0)i)/(2pi)=1100xx(2pixx10^(-7)xx2)/(10xx10^(-2))` <br> `=1.26xx10^(-3)Wb//m^(2)`

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