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Transistor Tuned Amplifiers

Study 40 Electrical Engineering MCQs with correct answers and explanations.

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31Electrical EngineeringMedium

When either L or C is increased, the resonant frequency of LC circuit ________?

AIncreases

BInsufficient data

CRemains the same

DDecreases

Correct answer

D. Decreases

Explanation

The correct answer is Decreases.

32Electrical EngineeringMedium

At series resonance, the circuit offers________ impedance?

AMaximum

BMinimum

CNone of the above

DZero

Correct answer

B. Minimum

Explanation

The correct answer is Minimum.

33Electrical EngineeringMedium

At parallel resonance, the net reactive component circuit current is ________?

AZero

BNone of the above

CInductive

DCapacitive

Correct answer

A. Zero

Explanation

The correct answer is Zero.

34Electrical EngineeringMedium

For frequencies above the resonant frequency, a series LC circuit behaves as a ________load?

AResistive

BNone of the above

CCapacitive

DInductive

Correct answer

D. Inductive

Explanation

The correct answer is Inductive.

35Electrical EngineeringMedium

At series resonance, the phase angle between applied voltage and circuit is________?

A0o

BNone of the above

C180o

D90o

Correct answer

A. 0o

Explanation

The correct answer is 0o.

36Electrical EngineeringMedium

At series resonance, the net reactive component of circuit current is ________?

ANone of the above

BInductive

CZero

DCapacitive

Correct answer

C. Zero

Explanation

The correct answer is Zero.

37Electrical EngineeringMedium

If the resistance of a tuned circuit is increased, the Q of the circuit ________?

AIs decreased

BNone of the above

CRemains the same

DIs increased

Correct answer

A. Is decreased

Explanation

The correct answer is Is decreased.

38Electrical EngineeringMedium

For frequencies below the resonant frequency, a parallel LC circuit behaves as a ________load?

ACapacitive

BResistive

CInductive

DNone of the above

Correct answer

C. Inductive

Explanation

The correct answer is Inductive.

39Electrical EngineeringMedium

A tuned amplifier is generally operated in ________operation?

ANone of the above

BClass B

CClass C

DClass A

Correct answer

C. Class C

Explanation

The correct answer is Class C.

40Electrical EngineeringMedium

In the above question, what are the values of cut-off frequencies?

A1020 kHz, 980 kHz

BNone of the above

C140 kHz, 60 kHz

D1030 kHz, 970 kHz

Correct answer

A. 1020 kHz, 980 kHz

Explanation

The correct answer is 1020 kHz, 980 kHz.

31Electrical EngineeringMedium

When either L or C is increased, the resonant frequency of LC circuit ________?

AIncreases

BInsufficient data

CRemains the same

DDecreases

Correct answer

D. Decreases

Explanation

The correct answer is Decreases.

32Electrical EngineeringMedium

At series resonance, the circuit offers________ impedance?

AMaximum

BMinimum

CNone of the above

DZero

Correct answer

B. Minimum

Explanation

The correct answer is Minimum.

33Electrical EngineeringMedium

At parallel resonance, the net reactive component circuit current is ________?

AZero

BNone of the above

CInductive

DCapacitive

Correct answer

A. Zero

Explanation

The correct answer is Zero.

34Electrical EngineeringMedium

For frequencies above the resonant frequency, a series LC circuit behaves as a ________load?

AResistive

BNone of the above

CCapacitive

DInductive

Correct answer

D. Inductive

Explanation

The correct answer is Inductive.

35Electrical EngineeringMedium

At series resonance, the phase angle between applied voltage and circuit is________?

A0o

BNone of the above

C180o

D90o

Correct answer

A. 0o

Explanation

The correct answer is 0o.

36Electrical EngineeringMedium

At series resonance, the net reactive component of circuit current is ________?

ANone of the above

BInductive

CZero

DCapacitive

Correct answer

C. Zero

Explanation

The correct answer is Zero.

37Electrical EngineeringMedium

If the resistance of a tuned circuit is increased, the Q of the circuit ________?

AIs decreased

BNone of the above

CRemains the same

DIs increased

Correct answer

A. Is decreased

Explanation

The correct answer is Is decreased.

38Electrical EngineeringMedium

For frequencies below the resonant frequency, a parallel LC circuit behaves as a ________load?

ACapacitive

BResistive

CInductive

DNone of the above

Correct answer

C. Inductive

Explanation

The correct answer is Inductive.

39Electrical EngineeringMedium

A tuned amplifier is generally operated in ________operation?

ANone of the above

BClass B

CClass C

DClass A

Correct answer

C. Class C

Explanation

The correct answer is Class C.

40Electrical EngineeringMedium

In the above question, what are the values of cut-off frequencies?

A1020 kHz, 980 kHz

BNone of the above

C140 kHz, 60 kHz

D1030 kHz, 970 kHz

Correct answer

A. 1020 kHz, 980 kHz

Explanation

The correct answer is 1020 kHz, 980 kHz.