Which of the following method of speed control of D.C. machine will offer minimum efficiency? Options: A . &nbspVoltage control method B . &nbspField control method C . &nbspArmature control method D . &nbspAll above methods

Which of the following method of speed control of D.C. machine will offer minimu

Question

Which of the following method of speed control of D.C. machine will offer minimum efficiency?

Options:

A . Voltage control method

B . Field control method

C . Armature control method

D . All above methods

Answer: Option C

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