A Bipolar Junction transistor has how many doped regions. a) 1 b) 2 d) 3 d)4

 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

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