Similarity between Hopkinonson’s and field’s test is that _______(a) both need similar mechanically coupled motor(b) both need similar electrically coupled motor(c) regenerative power(d) negligible powerThis question was posed to me in a job interview.Query is from Efficiency and Testing of DC Machines topic in chapter DC Machines of Electrical Machines

Similarity between Hopkinonson’s and field’s test is that _______(

1.	Similarity between Hopkinonson’s and field’s test is that _______(a) both need similar mechanically coupled motor(b) both need similar electrically coupled motor(c) regenerative power(d) negligible powerThis question was posed to me in a job interview.Query is from Efficiency and Testing of DC Machines topic in chapter DC Machines of Electrical Machines
Answer» The CORRECT OPTION is (a) both need SIMILAR mechanically coupled motor The explanation is: The machines have to be mechanically coupled TOGETHER.

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