Electrical Engineering Mcqs

If Q of an LC circuit increases, then bandwidth ______________?

(A) Increases
(B) Decreases
(C) Remains the same
(D) Insufficient data

Submitted By :Ali Uppal

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

(A) Sensitivity
(B) Fidelity
(C) Selectivity
(D) None of the above

Submitted By :Ali Uppal

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

(A) XL decreases and XC increases
(B) XL increases and XC decreases
(C) Line current becomes minimum
(D) None of the above

Submitted By :Ali Uppal

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

(A) 10kHz
(B) 40 kHz
(C) 30 kHz
(D) 20 kHz

Submitted By :Ali Uppal

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

(A) Resistive
(B) Inductive
(C) Capacitive
(D) None of the above

Submitted By :Ali Uppal

A class C amplifier always drives _____________load?

(A) A pure resistive
(B) A pure inductive
(C) A pure capacitive
(D) A resonant tank

Submitted By :Ali Uppal

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

(A) Inductive
(B) Resistive
(C) Capacitive
(D) None of the above

Submitted By :Ali Uppal

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

(A) 140 kHz , 60 kHz
(B) 1020 kHz , 980 kHz
(C) 1030 kHz , 970 kHz
(D) None of the above

Submitted By :Ali Uppal

At parallel resonance, the phase angle between the applied voltage and circuit current is _____________?

(A) 90o
(B) 180o
(C) 0o
(D) None of the above

Submitted By :Ali Uppal

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

(A) Very large
(B) Zero
(C) Small
(D) None of the above

Submitted By :Ali Uppal

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