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Semiconductor Theory

Study 35 Electrical Engineering MCQs with correct answers and explanations.

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31Electrical EngineeringMedium

The strength of a semiconductor crystal comes from________?

ANone of the above

BElectron-pair bonds

CForces between nuclei

DForces between protons

Correct answer

B. Electron-pair bonds

Explanation

The correct answer is Electron-pair bonds.

32Electrical EngineeringMedium

When the temperature of an extrinsic semiconductor is increased, the pronounced effect is on________?

AJunction capacitance

BMinority carriers

CNone of the above

DMajority carriers

Correct answer

B. Minority carriers

Explanation

The correct answer is Minority carriers.

33Electrical EngineeringMedium

When a pure semiconductor is heated, its resistance________?

AGoes up

BCan’t say

CGoes down

DRemains the same

Correct answer

C. Goes down

Explanation

The correct answer is Goes down.

34Electrical EngineeringMedium

Addition of pentavalent impurity to a semiconductor creates many________?

AValence electrons

BBound electrons

CHoles

DFree electrons

Correct answer

D. Free electrons

Explanation

The correct answer is Free electrons.

35Electrical EngineeringMedium

With forward bias to a pn junction, the width of depletion layer________?

ARemains the same

BIncreases

CDecreases

DNone of the above

Correct answer

C. Decreases

Explanation

The correct answer is Decreases.

31Electrical EngineeringMedium

The strength of a semiconductor crystal comes from________?

ANone of the above

BElectron-pair bonds

CForces between nuclei

DForces between protons

Correct answer

B. Electron-pair bonds

Explanation

The correct answer is Electron-pair bonds.

32Electrical EngineeringMedium

When the temperature of an extrinsic semiconductor is increased, the pronounced effect is on________?

AJunction capacitance

BMinority carriers

CNone of the above

DMajority carriers

Correct answer

B. Minority carriers

Explanation

The correct answer is Minority carriers.

33Electrical EngineeringMedium

When a pure semiconductor is heated, its resistance________?

AGoes up

BCan’t say

CGoes down

DRemains the same

Correct answer

C. Goes down

Explanation

The correct answer is Goes down.

34Electrical EngineeringMedium

Addition of pentavalent impurity to a semiconductor creates many________?

AValence electrons

BBound electrons

CHoles

DFree electrons

Correct answer

D. Free electrons

Explanation

The correct answer is Free electrons.

35Electrical EngineeringMedium

With forward bias to a pn junction, the width of depletion layer________?

ARemains the same

BIncreases

CDecreases

DNone of the above

Correct answer

C. Decreases

Explanation

The correct answer is Decreases.