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Electronics - Bipolar Junction Transistors (BJT)

Exercise : Bipolar Junction Transistors (BJT) - Filling the Blanks
1.
The input resistance of the base of an emitter-follower is usually _________.
very low
very high
shorted to ground
open
Answer: Option
Explanation:
No answer description is available. Let's discuss.
2.
The phase difference between the input and output ac voltage signals of a common-emitter amplifier is __________.
0º
90º
180º
360º
Answer: Option
Explanation:
No answer description is available. Let's discuss.
3.
Base bias provides _________.
a very stable Q point
a very unstable Q point
no current gain
zero current in the base and collector circuits
Answer: Option
Explanation:
No answer description is available. Let's discuss.
4.
VCE approximately equals ________ when a transistor switch is cut off.
VCC
VB
0.2 V
0.7 V
Answer: Option
Explanation:
No answer description is available. Let's discuss.
5.
The input resistance, Rin of a common-collector amplifier, consists of ____________.
Rin = RE × AC Current Gain
fba12_1009b1.gif
Rin = RE × alpha.gif
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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