Analog Electronics – Problems Page 28
Rapid Fire MCQs for GATE Revision
This section contains quick multiple choice questions from analog electronics useful for rapid revision before examinations.
MCQ 1
The thermal voltage at room temperature is approximately:
A) 10 mV B) 25 mV C) 50 mV D) 100 mV
Answer: B (25 mV)
MCQ 2
Which diode is used for voltage regulation?
A) Tunnel diode B) Zener diode C) LED D) Photodiode
Answer: B (Zener diode)
MCQ 3
In a BJT transistor:
A) IC = β IB B) IC = α IB C) IC = IE D) IC = IB
Answer: A
MCQ 4
The input impedance of an ideal op-amp is:
A) Zero B) Infinite C) Very small D) 1 kΩ
Answer: B (Infinite)
MCQ 5
The output impedance of an ideal op-amp is:
A) Infinite B) Zero C) 1 kΩ D) Very large
Answer: B (Zero)
MCQ 6
The Barkhausen criterion for oscillation is:
A) Aβ = 0 B) Aβ = 1 C) Aβ = 10 D) Aβ = 100
Answer: B
MCQ 7
The oscillator commonly used for audio frequency generation is:
A) Hartley oscillator B) Colpitts oscillator C) RC phase shift oscillator D) Crystal oscillator
Answer: C
MCQ 8
The cutoff frequency of an RC filter is:
A) 1/RC B) 1/(2πRC) C) RC D) 2πRC
Answer: B
MCQ 9
Which oscillator uses capacitive divider?
A) Hartley oscillator B) Colpitts oscillator C) Wien bridge oscillator D) RC oscillator
Answer: B
MCQ 10
The ripple factor of full wave rectifier is:
A) 0.121 B) 0.482 C) 1.21 D) 2
Answer: B
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