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Stumped on Study Question

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Leftyretro

New Member
This is a practice test for an exam. The answer is check but I want to know of to solve myself. Can some explain how to solve?
The 5vdc zener will keep point B at 5vdc no matter how high an applied voltage. The forward voltage drop of the conducting emitter/base junction will always be .7vdc.


Lefty
 

ronsimpson

Well-Known Member
Most Helpful Member
I can not see the picture very well.
Think:
What voltage range can point (B) have? What does a zener diode do?.
What voltage range can point (C) have? What is a base like? What happens if you try to pull the base up? What happens if you try to pull the base down?
What voltage range can point (D) have? If transistor is on=0.7 If transistor is off then supply
 
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