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Transistor Biasing

Study 40 Electrical Engineering MCQs with correct answers and explanations.

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11Electrical EngineeringMedium

If the value of collector current IC increases, then the value of VCE ________?

ANone of the above

BRemains the same

CIncreases

DDecreases

Correct answer

D. Decreases

Explanation

The correct answer is Decreases.

12Electrical EngineeringMedium

Transistor biasing represents ________ conditions?

Anone of the above

Bboth a.c. and d.c

Ca.c

Dd.c

Correct answer

D. d.c

Explanation

The correct answer is d.c.

13Electrical EngineeringMedium

If the maximum collector current due to signal alone is 3 mA, then zero signal collector current should be at least equal to________?

AmA

B6 mA

C1 mA

D3 mA

Correct answer

D. 3 mA

Explanation

The correct answer is 3 mA.

14Electrical EngineeringMedium

The value of VBE ________?

AIs strongly dependant on IC

BDepends upon IC to moderate extent

CIs almost independent of IC

DNone of the above

Correct answer

C. Is almost independent of IC

Explanation

The correct answer is Is almost independent of IC.

15Electrical EngineeringMedium

In a base resistor method, if the value of ß changes by 50, then collector current will change by a factor ________?

A50

B200

C25

D100

Correct answer

A. 50

Explanation

The correct answer is 50.

16Electrical EngineeringMedium

The leakage current in a silicon transistor is about________ the leakage current in a germanium transistor?

AOne tenth

BOne thousandth

COne millionth

DOne hundredth

Correct answer

B. One thousandth

Explanation

The correct answer is One thousandth.

17Electrical EngineeringMedium

For proper amplification by a transistor circuit, the operating point should be located at the________ of the d.c. load line?

AThe maximum current point

BThe end point

CMiddle

DNone of the above

Correct answer

C. Middle

Explanation

The correct answer is Middle.

18Electrical EngineeringMedium

Thermal runaway occurs when________?

ACollector is reverse biased

BJunction capacitance is high

CEmitter is forward biased

DTransistor is not biased

Correct answer

D. Transistor is not biased

Explanation

The correct answer is Transistor is not biased.

19Electrical EngineeringMedium

In a transistor amplifier circuit VCE = VCB +________?

ANone of the above

BVBE

C2VBE

D5 VBE

Correct answer

B. VBE

Explanation

The correct answer is VBE.

20Electrical EngineeringMedium

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

ABe zero

BBe between 0 V and 0.1 V

CNot fall below 0.7 V

DBe 0.01 V

Correct answer

C. Not fall below 0.7 V

Explanation

The correct answer is Not fall below 0.7 V.

11Electrical EngineeringMedium

If the value of collector current IC increases, then the value of VCE ________?

ANone of the above

BRemains the same

CIncreases

DDecreases

Correct answer

D. Decreases

Explanation

The correct answer is Decreases.

12Electrical EngineeringMedium

Transistor biasing represents ________ conditions?

Anone of the above

Bboth a.c. and d.c

Ca.c

Dd.c

Correct answer

D. d.c

Explanation

The correct answer is d.c.

13Electrical EngineeringMedium

If the maximum collector current due to signal alone is 3 mA, then zero signal collector current should be at least equal to________?

AmA

B6 mA

C1 mA

D3 mA

Correct answer

D. 3 mA

Explanation

The correct answer is 3 mA.

14Electrical EngineeringMedium

The value of VBE ________?

AIs strongly dependant on IC

BDepends upon IC to moderate extent

CIs almost independent of IC

DNone of the above

Correct answer

C. Is almost independent of IC

Explanation

The correct answer is Is almost independent of IC.

15Electrical EngineeringMedium

In a base resistor method, if the value of ß changes by 50, then collector current will change by a factor ________?

A50

B200

C25

D100

Correct answer

A. 50

Explanation

The correct answer is 50.

16Electrical EngineeringMedium

The leakage current in a silicon transistor is about________ the leakage current in a germanium transistor?

AOne tenth

BOne thousandth

COne millionth

DOne hundredth

Correct answer

B. One thousandth

Explanation

The correct answer is One thousandth.

17Electrical EngineeringMedium

For proper amplification by a transistor circuit, the operating point should be located at the________ of the d.c. load line?

AThe maximum current point

BThe end point

CMiddle

DNone of the above

Correct answer

C. Middle

Explanation

The correct answer is Middle.

18Electrical EngineeringMedium

Thermal runaway occurs when________?

ACollector is reverse biased

BJunction capacitance is high

CEmitter is forward biased

DTransistor is not biased

Correct answer

D. Transistor is not biased

Explanation

The correct answer is Transistor is not biased.

19Electrical EngineeringMedium

In a transistor amplifier circuit VCE = VCB +________?

ANone of the above

BVBE

C2VBE

D5 VBE

Correct answer

B. VBE

Explanation

The correct answer is VBE.

20Electrical EngineeringMedium

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

ABe zero

BBe between 0 V and 0.1 V

CNot fall below 0.7 V

DBe 0.01 V

Correct answer

C. Not fall below 0.7 V

Explanation

The correct answer is Not fall below 0.7 V.