Gkseries.com

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

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

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

A.            Voltage control method

B.            Field control method

C.            Armature control method

D.            All above methods

Answer: Armature control method

Exit mobile version