Here\'s the problem? The figure shows an arrangement known as a Helmholtz coil.

Question

Here's the problem?

The figure shows an arrangement known as a Helmholtz coil. It consists of two circular coaxial coils, each of 100 turns and radius R = 80 cm, separated by a distance R = 80 cm. The two coils carry equal currents i = 60 A in the same direction. Find the magnitude of the net magnetic field at P, on the axis midway (R/2) between the coils.

Here's the problem? The figure shows an arrangement known as a Helmholtz coil. It consists of two circular coaxial coils, each of 100 turns and radius R = 80 cm, separated by a distance R = 80 cm. The two coils carry equal currents i = 60 A in the same direction. Find the magnitude of the net magnetic field at P, on the axis midway (R/2) between the coils.

Explanation / Answer

magnetic field at te centre of these coils is given by

B = 4 uo n i/(5 sqrt5 * a)

B = 4* 4pi e-7 * 100 * 60 /( 5* sqrt5 * 0.40)

B = 6.74 milli Tesla

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