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51.

How many types of iron losses are present?(a) 2(b) 3(c) 4(d) 5The question was asked during an online exam.Question is taken from Determination of Iron Losses & Slot Leakage topic in division Principles of Magnetic Circuit Design of Design of Electrical Machines

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52.

What is the other name for the iron loss?(a) field loss(b) armature loss(c) winding loss(d) core lossThe question was asked in an internship interview.My question is taken from Determination of Iron Losses & Slot Leakage in section Principles of Magnetic Circuit Design of Design of Electrical Machines

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Correct OPTION is (d) core LOSS

To explain I would say: When ferromagnetic materials are subjected to a FLUX in a fixed direction in space and having a magnitude varying in time, losses are produced in the MACHINE. This is called iron loss or core loss.