8 points Skipped eBook Hint References An electromagnet is made by inserting a soft iron core into a solenoid. The solenoid has 1800 turns, radius 2.00 cm, and length 17.9 cm. When 2.00 A of current flows through the solenoid, the magnetic field inside the iron core has magnitude 0900 T4 What is the relative permeability KB of the iron core