Between Field’s test and Hopkinson’s test the main common thing is that both
A. use negligible power
B. are regenerative tests
C. need two similar mechanically coupled motors
D. need two electrically coupled series motors
Answer:C
Between Field’s test and Hopkinson’s test the main common thing is that both
A. use negligible power B. are regenerative tests C. need two similar mechanically coupled motors D. need two electrically coupled series motors