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Question

Physics Question on Moving charges and magnetism

A circular coil of radius 25 cm, carries a current of 50 amperes. I f it has 35 turns, the flux density at the centre of the coil is (in Wb/m2Wb/m^2)

A

π×10−3\pi \times 10^{-3}

B

1.4π×10−31.4\pi \times 10^{-3}

C

14π×10−314\pi \times 10^{-3}

D

2π×10−32\pi \times 10^{-3}

Answer

1.4π×10−31.4\pi \times 10^{-3}

Explanation

Solution

B=μ0 n i2rB=\frac{\mu_0\,n\,i}{2r}