In the hopkinson’s test on two DC machines. Machine A has field current of 1.4A and B has field current of 1.3A. Which machine acts as motor?(a) B(b) A(c) A, B(d) None of the mentionedThis question was posed to me by my school teacher while I was bunking the class.I'd like to ask this question from Efficiency and Testing of DC Machines topic in chapter DC Machines of Electrical Machines

In the hopkinson’s test on two DC machines. Machine A has field curr

1.	In the hopkinson’s test on two DC machines. Machine A has field current of 1.4A and B has field current of 1.3A. Which machine acts as motor?(a) B(b) A(c) A, B(d) None of the mentionedThis question was posed to me by my school teacher while I was bunking the class.I'd like to ask this question from Efficiency and Testing of DC Machines topic in chapter DC Machines of Electrical Machines
Answer» CORRECT answer is (a) B To explain I WOULD SAY: Ea/Eb = 1.4/1.3 Ea = 1.077 Eb > Eb So, the machine will act as motor.

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