The condition for maximum efficiency for a DC generator is __________(a) Eddy current losses = stray losses(b) Hysteresis losses = eddy current losses(c) Copper losses = 0(d) Variable losses = constant lossesThe question was posed to me in homework.My question comes from Efficiency of DC Machine- 2 topic in section Efficiency and Testing of DC Machines

The condition for maximum efficiency for a DC generator is __________(

1.	The condition for maximum efficiency for a DC generator is __________(a) Eddy current losses = stray losses(b) Hysteresis losses = eddy current losses(c) Copper losses = 0(d) Variable losses = constant lossesThe question was posed to me in homework.My question comes from Efficiency of DC Machine- 2 topic in section Efficiency and Testing of DC Machines
Answer» The CORRECT choice is (d) Variable losses = constant losses The EXPLANATION is: All losses in a given DC machine can be categorized into variable losses and constant losses. Variable losses are PROPORTIONAL to the square of armature current while constant losses are almost constant for a given DC machine THROUGHOUT its APPLICATION.

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