*66. (II) An iron-core solenoid is 38 cm long and 1.8cm in
Chapter 20, Problem 66(choose chapter or problem)
*66. (II) An iron-core solenoid is 38 cm long and 1.8cm in diameter, and has 640 turns of wire. TTie magnetic field inside the solenoid is 2.2 T when 48 A flows in the wire. What is the permeability /x at this high field strength ?
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