1 ) A Bipolar Junction transistor has how many doped regions : -
a) 1 b) 2
d) 3 d)4
Answer:- d) 3
2 ) For normal operation of the transistor, the
collector diode has to be . . . . . . . . . . . .
a) Forward biased b) Reverse biased
c) Nonconducting
d) Operating in
breakdown region
Answer:- b) Reverse biased
3 ) In the “forward active region “of operation of
BJT, . . . . . . . . . . . . . . . . .
a) The base-emitter junction is forward- biased and
the base-collector junction is reverse biased.
b) The base-emitter junction is reverse biased, and
the base-collector junction is forward- biased.
c) Both the base-emitter junction and the
base-collector junction are forward- biased.
d) Both the base-emitter junction and the
base-collector junction are reverse- biased.
Answer:- a) The base-emitter junction is forward-
biased and the base-collector junction is reverse biased.
4 ) In npn transistor, the majority carriers in the
base are . . . . . . . . . . . . . . .
a) Free electrons b)
Holes
c) Neither of them d)
Both
Answer:- b) Holes
5 ) The base of npn transistor is thin and
a) Heavily doped b)
Lightly doped
c) Metallic d)
Doped with a pentavalent material
Answer:- b) Lightly doped
6 ) In the npn the base current a is 16 µA and β=100, the emitter current is about _____________ .
a) 1.6 µA b) 1.6mA
c) 32 µA d) 32 mA
Answer:- b) 1.6mA
7 ) A transistor is biased at a collector current of
0.5 mA, the transconductance is about . . . . . . . . . . . . . . . .
a) 1/26 b)
1/52
c) 26 d) 52
Answer:- b) 1/52
8 ) In small signal Model of BJT, the forward-biased
diode between the base and the emitter is modeled by a ______
a) Capacitor b)
Resistor
c) Inductor d)
Diode
Answer:- b) Resistor
9 ) Bipolar Transistors are example of ____________
a) Voltage dependent Voltage source
b) Voltage dependent Current source
c) Current dependent Voltage source
d) Current dependent Current source
Answer:- b) Voltage dependent Current source
10 ) In the circuit shown in the figure, if Load
resistance is halved, what is output voltage.
a) 1.31 V b) 2.155
c) 3.8V d)
0.8V
Answer:- b) 2.155
