Question

1.Explain with the help of a labeled diagram the distribution of magnetic field due to a

current through a circular loop. On what factors the strength of magnetic field depends in case of circular loop?​

Answer 1

Solution,

• The magnetic field due to a current carrying circular loop is given by :

$B=\dfrac{\mu_o I}{2r}$ ...(1)

I is current in loop

r is radius of loop

• The attached figure shows the distribution of magnetic field due to a  current through a circular loop.
• The lines at the center of the loop is straight.
• The magnetic field at the center of the loop is perpendicular to the plane of the loop.

From equation (1) it is clear that the magnetic field depends on the following factors i.e.

1. Directly to the current flowing
2. Inversely proportional to the distance from loop