Question

What is the formula for the area of the conductors of the magnet coils?

(a) area of the conductors = mmf per coil * resistivity of conductor * length of mean turn * terminal voltage

(b) area of the conductors = mmf per coil / resistivity of conductor * length of mean turn * terminal voltage

(c) area of the conductors = mmf per coil * resistivity of conductor * length of mean turn / terminal voltage

(d) area of the conductors = mmf per coil * resistivity of conductor / length of mean turn * terminal voltage

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I want to ask this question from Design of Magnet Coils topic in section Design of Electromagnets of Design of Electrical Machines

Answer 1

Right choice is (c) area of the conductors = mmf per coil * resistivity of conductor * length of mean turn / terminal voltage

The explanation: For calculating the area of the conductors, first the mmf per coil is calculated along with the resistivity of conductors. The length of mean turn and terminal voltage is calculated and on substitution gives the area of the conductors.