Question: Answer: *12-5 A U-shaped electromagnet of length /, pole separation d, and permeability has a square cross section of area A. It is wound with

*12-5 A U-shaped electromagnet of length /, pole separation d, and permeability

Answer:

has a square cross section of area A. It is wound with

*12-5 A U-shaped electromagnet of length /, pole separation d, and permeability has a square cross section of area A. It is wound with N turns of wire carrying a current I. Calculate the force with which the magnet holds a bar of the same material (of the same cross section) against its poles. 12-5. (N1 A)/Ho(l+ d)

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