As compared to the use of a single series dc motor for electric traction for a given starting time t, the series parallel control using two similar motors with time t/2 for each series and parallel operation would give a saving in starting energy of
A. 100%
B. 50%
C. 25%
D. zero.
Answer:C
As compared to the use of a single series dc motor for electric traction for a given starting time t, the series parallel control using two similar motors with time t/2 for each series and parallel operation would give a saving in starting energy of
A. 100% B. 50% C. 25% D. zero.