Umer (programmer_1)

Race #303

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Official speed 52.48 wpm (77.52 seconds elapsed during race)
Race Start April 14, 2020 9:51:10am UTC
Race Finish April 14, 2020 9:52:28am UTC
Outcome Win (1 of 5)
Accuracy 95.0%
Points 50.73
Text #4060101 (Length: 339 characters)

A train equipped with, say, two dc motors, is started with both motors connected in series to an external resistor. As the speed picks up, the resistor is shorted out. The motors are then paralleled and connected in series with another resistor. Finally, the last resistor is shorted out, as the train reaches its nominal torque and speed.