Question:
A circular loop of radius $4.0 \mathrm{~cm}$ is placed in a horizontal plane and carries an electric current of $5.0 \mathrm{~A}$ in the clockwise direction as seen from above. Find the magnetic field
(a) at a point $3.0 \mathrm{~cm}$ above the center of the loop.
(b) At a point $3.0 \mathrm{~cm}$ below the center of the loop.
Solution:
