In the above figure, current flows through the field coil when either the start button or the stop button is pressed.
Answer the following statement true (T) or false (F)
True
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Answer the following statement(s) true (T) or false (F)
1. Synchronous motors are able to operate at the speed of the rotating magnetic field because they are not induction 2. The amortisseur winding provides good starting torque and a relatively high starting current. 3. A synchronous motor should never be started with excitation applied to the rotor. 4. The excitation current should be connected to the rotor only after it has accelerated to a speed that is close to synchronous speed 5. A synchronous motor can not be made to produce a leading power factor.
¿Qué dispositivo se utiliza normalmente para encender o apagar la iluminación en respuesta a sucesiones de acontecimientos conocidos o planificados?
a. Detector de movimiento b. Sensor de infrarrojos c. Sensor de sonido d. Temporizador electrónico
The output of a gate has an internal short; a current tracer will ________
A) show whether the gate is shorted to Vcc or ground B) be able to identify the defective load node C) probably not be able to locate the problem D) identify the defective gate
The value of pi to four decimal places is 3.____________________.
Fill in the blank(s) with the appropriate word(s).