Electrical Engineering MCQs

Page No. 114

In parallel resonance, there is _______________?


aBoth voltage and current amplification


bVoltage amplifications


cCurrent amplification


dNone of the above


View Answer Current amplification

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


aLoose


bTight


c Critical


dNone of the above


View Answer Loose

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


aCapacitive


bResistive


cInductive


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


b10


c50


d200


View Answer 200

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


aSensitivity


b. Fidelity


c Selectivity


d None of the above


View Answer Selectivity

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


aXL decreases and XC increases


bXL increases and XC decreases


cLine current becomes minimum


dNone of the above



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


a10kHz


b40 kHz


c30 kHz


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


bA pure inductive


cA pure capacitive


d A resonant tank


View Answer A resonant tank

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