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Bipolar Junction Transistors (bjt) Online Exam Quiz

Important questions about Bipolar Junction Transistors (bjt). Bipolar Junction Transistors (bjt) MCQ questions with answers. Bipolar Junction Transistors (bjt) exam questions and answers for students and interviews.

Options

A : I C /I B

B : I C /I E

C : I B /I E

D : I E /I B

2. When transistors are used in digital circuits they usually operate in the:

Options

A : active region

B : breakdown region

C : saturation and cutoff regions

D : linear region

Options

A : I E ? I C

B : I C + I E

C : I B + I C

D : I B ? I C

Options

A : 270 degrees

B : 180 degrees

C : 90 degrees

D : 0 degrees

5. With the positive probe on an NPN base, an ohmmeter reading between the other transistor terminals should be:

Options

A : open

B : infinite

C : low resistance

D : high resistance

6. Three different Q points are shown on a dc load line. The upper Q point represents the:

Options

A : minimum current gain

B : intermediate current gain

C : maximum current gain

D : cutoff point

Options

A : beta

B : theta

C : alpha

D : omega

8. Most of the electrons in the base of an NPN transistor flow:

Options

A : out of the base lead

B : into the collector

C : into the emitter

D : into the base supply

Options

A : voltage

B : current

C : resistance

D : power

1. A transistor may be used as a switching device or as a:

Options

A : fixed resistor

B : tuning device

C : rectifier

D : variable resistor

2. If a transistor operates at the middle of the dc load line, a decrease in the current gain will move the Q point:

Options

A : off the load line

B : nowhere

C : up

D : down

Options

A : 8.70 V

B : 4.35 V

C : 2.90 V

D : 0.7 V

Options

A : 30 µA

B : .3 µA

C : 3 mA

D : 3 MA

Options

A : tab end

B : middle

C : right end

D : stud mount

Options

A : V C

B : V CC

C : V B

D : I C

7. For a C-C configuration to operate properly, the collector-base junction should be reverse biased, while forward bias should be applied to which junction?

Options

A : collector-emitter

B : base-emitter

C : collector-base

D : cathode-anode

8. A collector characteristic curve is a graph showing:

Options

A : emitter current (I E ) versus collector-emitter voltage (V CE ) with (V BB ) base bias voltage held constant

B : collector current (I C ) versus collector-emitter voltage (V CE ) with (V BB ) base bias voltage held constant

C : collector current (I C ) versus collector-emitter voltage (V C ) with (V BB ) base bias voltage held constant

D : collector current (I C ) versus collector-emitter voltage (V CC ) with (V BB ) base bias voltage held constant

Options

A : voltage

B : current

C : resistance

D : power

Options

A : 0.05

B : 20

C : 50

D : 500

Options

A : ground

B : V C

C : V BE

D : V CC