A circular coil of radius has turns and carries a current of

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

Problem

A circular coil of radius

5\,\text{cm}

has

200

turns and carries a current of

3\,\text{A}

. Calculate the magnitude of the magnetic field at a point on the coil’s axis that is

8\,\text{cm}

from its centre.