In Hopkinson’s efficiency test for dc machines
A. both the machines are mechanically coupled.
B. both the machines are operated at full load.
C. one machine acts as a generator and another as a motor.
D. the armature current of the machine operating as a motor is more than that of the machine operating as a generator.
E. the field current of the machine operating as a generator is more than that of the machine operating as a motor.
F. all of the above.
Show Answer
Answer: F
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