Electrical Engineering MCQs

Page No. 114

In parallel resonance, there is _______________?


aBoth voltage and current amplification

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bVoltage amplifications

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cCurrent amplification

✓


dNone of the above

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View Answer Current amplification

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


aLoose

✓


bTight

✖


c Critical

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dNone of the above

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View Answer Loose

For frequencies above the resonant frequency, a parallel LC circuit behaves as a ____________ load?


aCapacitive

✓


bResistive

✖


cInductive

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dNone of the above

✖


View Answer Capacitive

In series resonance, there is__________________?


aVoltage amplification

✓


bCurrent amplification

✖


cBoth voltage and current amplification

✖


dNone of the above

✖


View Answer Voltage amplification

Frequencies above ______________ kHz are called radio frequencies?


a2

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b10

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c50

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d200

✓


View Answer 200

The Q of a tuned circuit refers to the property of_______________?


aSensitivity

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b. Fidelity

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c Selectivity

✓


d None of the above

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View Answer Selectivity

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


aXL decreases and XC increases

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bXL increases and XC decreases

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cLine current becomes minimum

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dNone of the above

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The Q of a tuned amplifier is 50. If the resonant frequency for the amplifier is 1000kHZ, then bandwidth is __________________?


a10kHz

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b40 kHz

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c30 kHz

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d20 kHz

✓


View Answer 20 kHz

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


a Resistive

✖


bInductive

✓


c Capacitive

✖


d None of the above

✖


View Answer Inductive

A class C amplifier always drives _____________load?


aA pure resistive

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bA pure inductive

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cA pure capacitive

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d A resonant tank

✓


View Answer A resonant tank

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