A flat circular coil of 50 turns and radius carries a steady current of

PHYSICS · Single correct · AP · Physics C: Electricity and Magnetism · Magnetic Fields and Electromagnetism · Magnetic Fields and Electromagnetism

Problem

A flat circular coil of 50 turns and radius

5\,\text{cm}

carries a steady current of

3\,\text{A}

. Calculate the magnitude of the magnetic field at the centre of the coil. (Take

\mu_0 = 4\pi \times 10^{-7}\,\text{T m A}^{-1}

.) (a)

7.5 \times 10^{3}\,\mu\text{T}

(b)

9.4 \times 10^{2}\,\mu\text{T}

(c)

1.9 \times 10^{3}\,\mu\text{T}

(d)

3.8 \times 10^{3}\,\mu\text{T}