Question: An electromagnet is made by inserting a soft iron core into a solenoid. The solenoid has 1800 turns, radius 2.00 cm, and length 24.0 cm.

An electromagnet is made by inserting a soft iron core into a solenoid. The solenoid has 1800 turns, radius 2.00 cm, and length 24.0 cm. When 2.00 A of current flows through the solenoid, the magnetic field inside the iron core has magnitude 0.670 T. What is the relative permeability KB of the iron core

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