Copper brushes in D.C. machine are used_____________? – McqOptions

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1.	Copper brushes in D.C. machine are used_____________?
A.	where low voltage and high currents are involved
B.	where high voltage and small cur-rents are involved
C.	in both of the above cases
D.	in none of the above cases
Answer» B. where high voltage and small cur-rents are involved

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