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Analog Electronics

Study 46 Electrical Engineering MCQs with correct answers and explanations.

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41Electrical EngineeringMedium

In a CB amplifier the maximum efficiency could be________?

A50%

B99%

C85%

D25%

Correct answer

D. 25%

Explanation

The correct answer is 25%.

42Electrical EngineeringMedium

Which of the following amplifier circuit using junction transistor has the best gain?

AAll have the same gain

BCommon base

CCommon emitter

DCommon collector

Correct answer

C. Common emitter

Explanation

The correct answer is Common emitter.

43Electrical EngineeringMedium

A differential amplifier is invariably used in the i/p stage of all OP-amps. This is done basically to provide the OP-amps with a very high________?

ACMMR

BSlew rate

CBandwidth

DOpen-loop gain

Correct answer

B. Slew rate

Explanation

The correct answer is Slew rate.

44Electrical EngineeringMedium

The early effect in a bipolar junction transistor is caused by________?

Afast turn-on

Blarge emitter-base forward bias

Clarge collector-base reverse bias

Dfast turn-off

Correct answer

C. large collector-base reverse bias

Explanation

The correct answer is large collector-base reverse bias.

45Electrical EngineeringMedium

Class AB operation is often used in power large signal amplifiers in order to________?

Aremove even harmonics

Bget maximum efficiency

Creducing collector dissipation

Dovercome a crossover distortion

Correct answer

D. overcome a crossover distortion

Explanation

The correct answer is overcome a crossover distortion.

46Electrical EngineeringMedium

The action of JFET in its equivalent circuit can best be represented as a________?

Avoltage controlled current source

BCurrent controlled voltage source

CVoltage controlled voltage source

DCurrent controlled Current source

Correct answer

A. voltage controlled current source

Explanation

The correct answer is voltage controlled current source.

41Electrical EngineeringMedium

In a CB amplifier the maximum efficiency could be________?

A50%

B99%

C85%

D25%

Correct answer

D. 25%

Explanation

The correct answer is 25%.

42Electrical EngineeringMedium

Which of the following amplifier circuit using junction transistor has the best gain?

AAll have the same gain

BCommon base

CCommon emitter

DCommon collector

Correct answer

C. Common emitter

Explanation

The correct answer is Common emitter.

43Electrical EngineeringMedium

A differential amplifier is invariably used in the i/p stage of all OP-amps. This is done basically to provide the OP-amps with a very high________?

ACMMR

BSlew rate

CBandwidth

DOpen-loop gain

Correct answer

B. Slew rate

Explanation

The correct answer is Slew rate.

44Electrical EngineeringMedium

The early effect in a bipolar junction transistor is caused by________?

Afast turn-on

Blarge emitter-base forward bias

Clarge collector-base reverse bias

Dfast turn-off

Correct answer

C. large collector-base reverse bias

Explanation

The correct answer is large collector-base reverse bias.

45Electrical EngineeringMedium

Class AB operation is often used in power large signal amplifiers in order to________?

Aremove even harmonics

Bget maximum efficiency

Creducing collector dissipation

Dovercome a crossover distortion

Correct answer

D. overcome a crossover distortion

Explanation

The correct answer is overcome a crossover distortion.

46Electrical EngineeringMedium

The action of JFET in its equivalent circuit can best be represented as a________?

Avoltage controlled current source

BCurrent controlled voltage source

CVoltage controlled voltage source

DCurrent controlled Current source

Correct answer

A. voltage controlled current source

Explanation

The correct answer is voltage controlled current source.