What is the material used in the lamination of the magnetic poles of small universal commutator motor?
(a) copper
(b) aluminium
(c) gold
(d) sheet steel
I got this question by my school teacher while I was bunking the class.
My enquiry is from Design of Small Universal Commutator Motors topic in division Design of Small Electrical Machines, Starters and Field Regulators of Design of Electrical Machines