What is the relation of the copper loss and brush contacts with the total loss in small dc motors?(a) copper loss and brush contacts = 2 * total loss(b) copper loss and brush contacts = 2/3 * total loss(c) copper loss and brush contacts = 1/3 * total loss(d) copper loss and brush contacts =total lossThe question was asked by my college director while I was bunking the class.I want to ask this question from Design of Small Universal Commutator Motors in portion Design of Small Electrical Machines, Starters and Field Regulators of Design of Electrical Machines

What is the relation of the copper loss and brush contacts with the to

1.	What is the relation of the copper loss and brush contacts with the total loss in small dc motors?(a) copper loss and brush contacts = 2 * total loss(b) copper loss and brush contacts = 2/3 * total loss(c) copper loss and brush contacts = 1/3 * total loss(d) copper loss and brush contacts =total lossThe question was asked by my college director while I was bunking the class.I want to ask this question from Design of Small Universal Commutator Motors in portion Design of Small Electrical Machines, Starters and Field Regulators of Design of Electrical Machines
Answer» The correct CHOICE is (B) COPPER loss and brush contacts = 2/3 * total loss Explanation: The copper loss and brush contact loss is being COMPARED with the total loss in order to deduce an equation. The copper loss and brush contact loss is 2/3 TIMES the total loss.

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