Question

a) Derive the equation for magnetic field on the axis of a circular current loop

b) Draw the magnetic field lines due to a circular wire. Which rule give magnetic

field.​

Answer 1

The magnetic field strength at the center of a circular loop is given by B = μ 0 I 2 R (at center of loop) , B = μ 0 I 2 R (at center of loop) , where R is the radius of the loop. RHR-2 gives the direction of the field about the loop.