Why is the arrow on the BJT schematic symbol important（）
A. It identifies the emitter terminal and the type of BJT
B. It identifies the collector terminal and the type of BJT
C. It identifies the base terminal and the type of BJT
D. None of the above
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In a small-signal transistor, the typical range of the parameter α is _____（）
A. greater than 1
B. between 0 and 1
C. almost equal to 1 but always less than 1 （0.9 to 1.0）
D. almost equal to 1 but always greater than 1 （1.0 to 1.1）
Pentavalent atoms are often referred to as _____（）
A. donor atoms
B. minority carriers
C. acceptor atoms
D. majority carriers
Which of the following circuits is used to change the dc reference of a signal without changing the shape of the signal（）
A. a clipper
B. a clamper
C. a voltage multiplier
D. a voltage divider
The electrode with n-type material of a diode is called the _____（）
A. anode
B. cathode
C. depletion region
D. Zener region
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