In a pass-transistor regulator, the base transistor voltage is held relatively constant by a
A) JFET B) silicon junction diode
C) zener diode D) NPN transistor
C
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The properties of this material can be altered by changing the carbon content.
a. alloy cast iron b. malleable cast iron c. nodular cast iron d. steel
Describe the role that purchasing plays in the supply chain
What will be an ideal response?
A 120 V (rms), 60 Hz source is connected to a full-wave bridge The load is an arc welding machine that can be represented by a resistance of 1 ? in series with an inductive reactance of 3 ?. At a triggering angle of 60o, the current of the load is continuous. Calculate the following:
a. Average voltage across the load
b. Average voltage across the resistive element of the load
c. Average current of the load
The shaded pole motor ____.
A. has little starting torque B. has excessive starting torque C. has greater efficiency than most split-phase motors D. will start against a heavy starting load