An iron bar magnet having a coercivity of 7000 A/m is to
Chapter 20, Problem 20.20(choose chapter or problem)
An iron bar magnet having a coercivity of 7000 A/m is to be demagnetized. If the bar is inserted within a cylindrical wire coil 0.25 m long and having 150 turns, what electric current is required to generate the necessary magnetic field?
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