Solved: An iron-core solenoid is 38 cm long and 1.8 cm in
Chapter 15, Problem 66P(choose chapter or problem)
(II) An iron-core solenoid is \(38 \mathrm{~cm}\) long and \(1.8 \mathrm{~cm}\) in diameter, and has 640 turns of wire. The magnetic field inside the solenoid is \(2.2 \mathrm{~T}\) when \(48 \mathrm{~A}\) flows in the wire. What is the permeability \(\mu\) at this high field strength?
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