A circular loop of insulated copper wire of radius is held vertically and carries a…
PHYSICS · Multi-part · CBSE · Physics · Magnetic Effects of Electric Current · Magnetic Effects of Electric Current
Problem
A circular loop of insulated copper wire of radius 5cm is held vertically and carries a steady current I. A student stands directly in front of the loop.
(i) Describe a simple procedure the student can follow to decide which face of the loop behaves as its north pole.
(ii) Draw a neat, labelled diagram to show the pattern of magnetic field lines produced by the loop in its plane and along its axis.
(iii) Explain, with reasons, why the magnetic field inside the loop is nearly uniform and why the field lines spread out rapidly outside the loop.