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Transistors

Study 42 Electrical Engineering MCQs with correct answers and explanations.

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1Electrical EngineeringMedium

In a pnp transistor, the current carriers are________?

Adonor ions

Bfree electrons

Choles

Dacceptor ions

Correct answer

C. holes

Explanation

The correct answer is holes.

2Electrical EngineeringMedium

The emitter of a transistor is________doped?

Anone of the above

Bheavily

Cmoderately

Dlightly

Correct answer

B. heavily

Explanation

The correct answer is heavily.

3Electrical EngineeringMedium

The base of a transistor is________doped?

Aheavily

Bnone of the above

Clightly

Dmoderately

Correct answer

C. lightly

Explanation

The correct answer is lightly.

4Electrical EngineeringMedium

In a transistor ________?

AIB = IC + IE

BIC = IE + IB

CIE = IC – IB

Correct answer

C. IE = IC – IB

Explanation

The correct answer is IE = IC – IB.

5Electrical EngineeringMedium

In a tansistor, IC = 100 mA and IE = 100.2 mA. The value of ß is________?

A100

B200

C50

Dabout 1

Correct answer

B. 200

Explanation

The correct answer is 200.

6Electrical EngineeringMedium

The phase difference between the input and output voltages of a transistor connected in common emitter arrangement is________?

A180o

B90o

C270o

D0o

Correct answer

A. 180o

Explanation

The correct answer is 180o.

7Electrical EngineeringMedium

The leakage current in CE arrangement is________that in CB arrangement?

Amore than

Bthe same as

Cless than

Dnone of the above

Correct answer

A. more than

Explanation

The correct answer is more than.

8Electrical EngineeringMedium

The most commonly used transistor arrangement is________arrangement?

Acommon collector

Bnone of the above

Ccommon emitter

Dcommon base

Correct answer

C. common emitter

Explanation

The correct answer is common emitter.

9Electrical EngineeringMedium

In a transistor if ß = 100 and collector current is 10 mA, then IE is________?

Anone of the above

B110 mA

C100 mA

D100.1 mA

Correct answer

D. 100.1 mA

Explanation

The correct answer is 100.1 mA.

10Electrical EngineeringMedium

The voltage gain in a transistor connected in________arrangement is the highest?

Acommon collector

Bnone of the above

Ccommon emitter

Dcommon base

Correct answer

C. common emitter

Explanation

The correct answer is common emitter.

1Electrical EngineeringMedium

In a pnp transistor, the current carriers are________?

Adonor ions

Bfree electrons

Choles

Dacceptor ions

Correct answer

C. holes

Explanation

The correct answer is holes.

2Electrical EngineeringMedium

The emitter of a transistor is________doped?

Anone of the above

Bheavily

Cmoderately

Dlightly

Correct answer

B. heavily

Explanation

The correct answer is heavily.

3Electrical EngineeringMedium

The base of a transistor is________doped?

Aheavily

Bnone of the above

Clightly

Dmoderately

Correct answer

C. lightly

Explanation

The correct answer is lightly.

4Electrical EngineeringMedium

In a transistor ________?

AIB = IC + IE

BIC = IE + IB

CIE = IC – IB

Correct answer

C. IE = IC – IB

Explanation

The correct answer is IE = IC – IB.

5Electrical EngineeringMedium

In a tansistor, IC = 100 mA and IE = 100.2 mA. The value of ß is________?

A100

B200

C50

Dabout 1

Correct answer

B. 200

Explanation

The correct answer is 200.

6Electrical EngineeringMedium

The phase difference between the input and output voltages of a transistor connected in common emitter arrangement is________?

A180o

B90o

C270o

D0o

Correct answer

A. 180o

Explanation

The correct answer is 180o.

7Electrical EngineeringMedium

The leakage current in CE arrangement is________that in CB arrangement?

Amore than

Bthe same as

Cless than

Dnone of the above

Correct answer

A. more than

Explanation

The correct answer is more than.

8Electrical EngineeringMedium

The most commonly used transistor arrangement is________arrangement?

Acommon collector

Bnone of the above

Ccommon emitter

Dcommon base

Correct answer

C. common emitter

Explanation

The correct answer is common emitter.

9Electrical EngineeringMedium

In a transistor if ß = 100 and collector current is 10 mA, then IE is________?

Anone of the above

B110 mA

C100 mA

D100.1 mA

Correct answer

D. 100.1 mA

Explanation

The correct answer is 100.1 mA.

10Electrical EngineeringMedium

The voltage gain in a transistor connected in________arrangement is the highest?

Acommon collector

Bnone of the above

Ccommon emitter

Dcommon base

Correct answer

C. common emitter

Explanation

The correct answer is common emitter.