Question

A toroidal solenoid with 400 turns of wire and a mean radius of 6.0 cm carries a current of 0.25 A. The relative permeability of the core is 80.

(a) What is the magnetic field in the core?
(b) What part of the magnetic field is due to atomic currents?

Answer 1

A) 0.0267 T

B) 0.0263 T

Step-by-step explanation:

Given that

The number of turns, N = 400

Radius of the wire, r = 6 cm = 0.06 m

Current in the wire, I = 0.25 A

Relative permeability, K(m) = 80

See the attached picture for the calculation