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Transistor Tuned Amplifiers

Study 40 Electrical Engineering MCQs with correct answers and explanations.

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1Electrical EngineeringMedium

In a parallel LC circuit, if the signal frequency is decreased below the resonant frequency, then________?

ANone of the above

BXL increases and XC decreases

CLine current becomes minimum

DXL decreases and XC increases

Correct answer

D. XL decreases and XC increases

Explanation

The correct answer is XL decreases and XC increases.

2Electrical EngineeringMedium

A tuned amplifier uses________load?

AResistive

BInductive

CLC tank

DCapacitive

Correct answer

C. LC tank

Explanation

The correct answer is LC tank.

3Electrical EngineeringMedium

At parallel resonance, the ratio L/C is ________?

ANone of the above

BVery large

CZero

DSmall

Correct answer

B. Very large

Explanation

The correct answer is Very large.

4Electrical EngineeringMedium

Frequencies above ________ kHz are called radio frequencies?

A10

C200

D50

Correct answer

C. 200

Explanation

The correct answer is 200.

5Electrical EngineeringMedium

In series resonance, there is________?

ABoth voltage and current amplification

BCurrent amplification

CVoltage amplification

DNone of the above

Correct answer

C. Voltage amplification

Explanation

The correct answer is Voltage amplification.

6Electrical EngineeringMedium

For frequencies below resonant frequency, a series LC circuit behaves as a ________ load?

AInductive

BResistive

CCapacitive

DNone of the above

Correct answer

C. Capacitive

Explanation

The correct answer is Capacitive.

7Electrical EngineeringMedium

If a high degree of selectivity is desired, then double-tuned circuit should have ________ coupling?

ATight

BCritical

CNone of the above

DLoose

Correct answer

D. Loose

Explanation

The correct answer is Loose.

8Electrical EngineeringMedium

Double tuned circuits are used in ________ stages of a radio receiver?

AIF

BOutput

CNone of the above

DAudio

Correct answer

A. IF

Explanation

The correct answer is IF.

9Electrical EngineeringMedium

In the double tuned circuit, if the mutual inductance between the two tuned circuits is decreased, the level of resonance curve ________?

AIs raised

BIs lowered

CRemains the same

DNone of the above

Correct answer

A. Is raised

Explanation

The correct answer is Is raised.

10Electrical EngineeringMedium

In parallel resonance, there is ________?

AVoltage amplifications

BCurrent amplification

CNone of the above

DBoth voltage and current amplification

Correct answer

B. Current amplification

Explanation

The correct answer is Current amplification.

1Electrical EngineeringMedium

In a parallel LC circuit, if the signal frequency is decreased below the resonant frequency, then________?

ANone of the above

BXL increases and XC decreases

CLine current becomes minimum

DXL decreases and XC increases

Correct answer

D. XL decreases and XC increases

Explanation

The correct answer is XL decreases and XC increases.

2Electrical EngineeringMedium

A tuned amplifier uses________load?

AResistive

BInductive

CLC tank

DCapacitive

Correct answer

C. LC tank

Explanation

The correct answer is LC tank.

3Electrical EngineeringMedium

At parallel resonance, the ratio L/C is ________?

ANone of the above

BVery large

CZero

DSmall

Correct answer

B. Very large

Explanation

The correct answer is Very large.

4Electrical EngineeringMedium

Frequencies above ________ kHz are called radio frequencies?

A10

C200

D50

Correct answer

C. 200

Explanation

The correct answer is 200.

5Electrical EngineeringMedium

In series resonance, there is________?

ABoth voltage and current amplification

BCurrent amplification

CVoltage amplification

DNone of the above

Correct answer

C. Voltage amplification

Explanation

The correct answer is Voltage amplification.

6Electrical EngineeringMedium

For frequencies below resonant frequency, a series LC circuit behaves as a ________ load?

AInductive

BResistive

CCapacitive

DNone of the above

Correct answer

C. Capacitive

Explanation

The correct answer is Capacitive.

7Electrical EngineeringMedium

If a high degree of selectivity is desired, then double-tuned circuit should have ________ coupling?

ATight

BCritical

CNone of the above

DLoose

Correct answer

D. Loose

Explanation

The correct answer is Loose.

8Electrical EngineeringMedium

Double tuned circuits are used in ________ stages of a radio receiver?

AIF

BOutput

CNone of the above

DAudio

Correct answer

A. IF

Explanation

The correct answer is IF.

9Electrical EngineeringMedium

In the double tuned circuit, if the mutual inductance between the two tuned circuits is decreased, the level of resonance curve ________?

AIs raised

BIs lowered

CRemains the same

DNone of the above

Correct answer

A. Is raised

Explanation

The correct answer is Is raised.

10Electrical EngineeringMedium

In parallel resonance, there is ________?

AVoltage amplifications

BCurrent amplification

CNone of the above

DBoth voltage and current amplification

Correct answer

B. Current amplification

Explanation

The correct answer is Current amplification.