How is dynamic braking for a DC motor accomplished?
What will be an ideal response?
Dynamic braking for a DC motor is accomplished by permitting power to remain connected to the shunt field when the motor is stopped, and reconnecting the armature to a high wattage resistor.
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En la Figura 1, la resistencia total aproximada del circuito es de _____ ohmios.
a. 70
b. 120
c. 50
d. 29
A barometer is used to read:
A) System pressures. B) Atmospheric pressure. C) Relative humidity. D) Wind speed.
Which of the following is true of the current in a capacitive circuit?
a. It leads the voltage. b. It lags the voltage. c. It is the same as the voltage. d. It counteracts the voltage.
A parts list can also be called a(n) ____.
A. list of materials B. part identification number C. purchase part list D. engineering analysis E. none of the above