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Transistor Biasing

Study 40 Electrical Engineering MCQs with correct answers and explanations.

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21Electrical EngineeringMedium

The operating point ________ on the a.c. load line?

ADoes not lie

BMay or may not lie

CData insufficient

DAlso line

Correct answer

D. Also line

Explanation

The correct answer is Also line.

22Electrical EngineeringMedium

In the above question (Q38.), what is the collector voltage?

A3 V

B7 V

C6 V

D8 V

Correct answer

A. 3 V

Explanation

The correct answer is 3 V.

23Electrical EngineeringMedium

For germanium transistor amplifier, VCE should________for faithful amplification?

ABe 0.2 V

BNot fall below 0.7 V

CBe zero

DNone of the above

Correct answer

B. Not fall below 0.7 V

Explanation

The correct answer is Not fall below 0.7 V.

24Electrical EngineeringMedium

If the temperature increases, the value of VCE________?

AIs decreased

BIs increased

CRemains the same

DNone of the above

Correct answer

A. Is decreased

Explanation

The correct answer is Is decreased.

25Electrical EngineeringMedium

Transistor biasing is done to keep ________in the circuit?

ACollector current small

BProper direct current

CProper alternating current

DThe base current small

Correct answer

B. Proper direct current

Explanation

The correct answer is Proper direct current.

26Electrical EngineeringMedium

Transistor biasing is generally provided by a________?

ADiode

BNone of the above

CBias battery

DBiasing circuit

Correct answer

D. Biasing circuit

Explanation

The correct answer is Biasing circuit.

27Electrical EngineeringMedium

For faithful amplification by a transistor circuit, the value of VCE should________for silicon transistor?

ABe 0.2 V

BNone of the above

CBe zero

DNot fall below 1 V

Correct answer

D. Not fall below 1 V

Explanation

The correct answer is Not fall below 1 V.

28Electrical EngineeringMedium

When the temperature changes, the operating point is shifted due to ________?

AChange in VCC

BChange in the values of circuit resistance

CNone of the above

DChange in ICBO

Correct answer

D. Change in ICBO

Explanation

The correct answer is Change in ICBO.

29Electrical EngineeringMedium

The disadvantage of voltage divider bias is that it has ________?

ALow base current

BMany resistors

CHigh stability factor

DNone of the above

Correct answer

B. Many resistors

Explanation

The correct answer is Many resistors.

30Electrical EngineeringMedium

The point of intersection of d.c. and a.c. load lines represents ________?

AOperating point

BNone of the above

CCurrent gain

DVoltage gain

Correct answer

A. Operating point

Explanation

The correct answer is Operating point.

21Electrical EngineeringMedium

The operating point ________ on the a.c. load line?

ADoes not lie

BMay or may not lie

CData insufficient

DAlso line

Correct answer

D. Also line

Explanation

The correct answer is Also line.

22Electrical EngineeringMedium

In the above question (Q38.), what is the collector voltage?

A3 V

B7 V

C6 V

D8 V

Correct answer

A. 3 V

Explanation

The correct answer is 3 V.

23Electrical EngineeringMedium

For germanium transistor amplifier, VCE should________for faithful amplification?

ABe 0.2 V

BNot fall below 0.7 V

CBe zero

DNone of the above

Correct answer

B. Not fall below 0.7 V

Explanation

The correct answer is Not fall below 0.7 V.

24Electrical EngineeringMedium

If the temperature increases, the value of VCE________?

AIs decreased

BIs increased

CRemains the same

DNone of the above

Correct answer

A. Is decreased

Explanation

The correct answer is Is decreased.

25Electrical EngineeringMedium

Transistor biasing is done to keep ________in the circuit?

ACollector current small

BProper direct current

CProper alternating current

DThe base current small

Correct answer

B. Proper direct current

Explanation

The correct answer is Proper direct current.

26Electrical EngineeringMedium

Transistor biasing is generally provided by a________?

ADiode

BNone of the above

CBias battery

DBiasing circuit

Correct answer

D. Biasing circuit

Explanation

The correct answer is Biasing circuit.

27Electrical EngineeringMedium

For faithful amplification by a transistor circuit, the value of VCE should________for silicon transistor?

ABe 0.2 V

BNone of the above

CBe zero

DNot fall below 1 V

Correct answer

D. Not fall below 1 V

Explanation

The correct answer is Not fall below 1 V.

28Electrical EngineeringMedium

When the temperature changes, the operating point is shifted due to ________?

AChange in VCC

BChange in the values of circuit resistance

CNone of the above

DChange in ICBO

Correct answer

D. Change in ICBO

Explanation

The correct answer is Change in ICBO.

29Electrical EngineeringMedium

The disadvantage of voltage divider bias is that it has ________?

ALow base current

BMany resistors

CHigh stability factor

DNone of the above

Correct answer

B. Many resistors

Explanation

The correct answer is Many resistors.

30Electrical EngineeringMedium

The point of intersection of d.c. and a.c. load lines represents ________?

AOperating point

BNone of the above

CCurrent gain

DVoltage gain

Correct answer

A. Operating point

Explanation

The correct answer is Operating point.