A 109cmlong solenoid contains 757 turns and carries a curren

A 10.9-cm-long solenoid contains 757 turns and carries a current of 5.19 A. What is the strength of the magnetic field at the center of this solenoid?

Solution

B = mu₀ N I / L

= (4 pi * 10^-7 * 757 * 5.19) / (10.9 * 10^-2)

= 0.0453 T

= 4.5 * 10^-2 T