A dc series motor runs a constant-torque load. The terminal voltage of the motor is 200 V, the speed is 500 rpm, the armature current is 25 A, the armature resistance is 0.2 ?, and the field resistance is 0.6 ?. If the armature is shunted by a 10 ? resistance, what is the speed of the motor?
What will be an ideal response?
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Which of the following is a characteristic of AC power?
A) Polarity is fixed B) Voltage remains constant C) Heating effect is less than DC D) It can be varied for power distribution
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One method of controlling the output is with small relays, in which the CPU controls the ____.
a. relay coil b. light-emitting diode c. resistor d. action of the timer
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