A solenoid is 235 m long has a radius of 0863 cm and has 570

A solenoid is 2.35 m long, has a radius of 0.863 cm, and has 570 turns. It carries a current I of 2.39 A. What is the magnitude of the magnetic field B inside the solenoid and far from either end?

Solution

B_solenoid = mu₀ n I / L

= 4pi * 10^-7 * 570 * 2.39 / 2.35

= 7.28 * 10^-4 T