Copper brushes in D.C. machine are used
A. Where low voltage and high currents are involved
B. Where high voltage and small currents are involved
C. In both of the above cases
D. In none of the above cases
Answer: Option A
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Related Questions on D.C. Generators
A cumulatively compounded long shunt generator when operating as a motor would be
A. Cumulatively compounded long shunt
B. Differentially compounded long shunt
C. Cumulatively compounded short shunt
D. Differentially compounded short shunt
A. Demagnetization only
B. Cross magnetization as well as magnetization
C. Cross-magnetization as well as demagnetizing
D. Cross magnetization only
In DC generators brushes are used for