MHT CET Physics question
Not in JEE Advanced syllabus
A closely wound flat circular coil of 25 turns of wire has diameter of 10 cm and carries a current of 4 ampere. Determine the flux density at the centre of a coil
Answer: (C)
Solution
\frac{μ_0 NI}{2r}\frac{4π×10^{-7}×25×4}{2×0.05}$ =
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