The amount of energy returned to the line during regeneration depends

1.	The amount of energy returned to the line during regeneration depends on
A.	the initial and final speeds during regenerative braking
B.	efficiency of the system
C.	the train resistance and gradient of track also in case the train is moving down the gradient
D.	all of the above
Answer» C. the train resistance and gradient of track also in case the train is moving down the gradient

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The amount of energy returned to the line during regeneration depends on

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