Analog Electronics – MCQsBy: Prof. Dr. Fazal Rehman | Last updated: April 22, 2025 25 Score: 0 Attempted: 0/25 Subscribe 1. : What is the basic building block of analog electronics? (A) Diode (B) Transistor (C) Inductor (D) Resistor 2. : Which component is used to amplify signals in analog circuits? (A) Diode (B) Transistor (C) Resistor (D) Capacitor 3. : What is the typical voltage gain of an ideal operational amplifier (op-amp)? (A) 0 (B) 1 (C) Infinite (D) 10 4. : The input impedance of an ideal op-amp is: (A) Zero (B) Low (C) Very high (D) Medium 5. : A capacitor stores energy in the form of: (A) Magnetic field (B) Electric field (C) Mechanical stress (D) Heat 6. : Which configuration of a transistor offers high voltage and current gain? (A) Common base (B) Common emitter (C) Common collector (D) Emitter follower 7. : What is the purpose of a biasing circuit in analog electronics? (A) To limit current (B) To regulate voltage (C) To set the operating point of a transistor (D) To amplify AC signals 8. : In an RC low-pass filter, increasing the resistance will: (A) Increase cutoff frequency (B) Decrease cutoff frequency (C) Have no effect (D) Eliminate all signals 9. : The frequency at which the gain of a filter falls to 70.7% of its maximum is called: (A) Peak frequency (B) Resonance frequency (C) Cutoff frequency (D) Threshold frequency 10. : What does the term “slew rate” refer to in op-amps? (A) The input impedance (B) The output resistance (C) The rate of change of output voltage (D) The power gain 11. : Which of the following is a linear analog circuit? (A) Comparator (B) Oscillator (C) Differential amplifier (D) Schmitt trigger 12. : The output of a full-wave rectifier is: (A) Pure DC (B) Pulsating DC (C) AC (D) Zero 13. : Which device is used to convert AC to DC in analog circuits? (A) Transistor (B) Diode (C) Capacitor (D) Inductor 14. : What is the unit of gain when expressed in decibels (dB)? (A) Amps (B) Volts (C) No unit (D) dB 15. : What type of feedback is used in oscillators? (A) Negative feedback (B) Positive feedback (C) No feedback (D) Mixed feedback 16. : A zener diode is primarily used for: (A) Rectification (B) Signal mixing (C) Voltage regulation (D) Current amplification 17. : The gain-bandwidth product of an op-amp is: (A) Always decreasing (B) Constant (C) Variable with voltage (D) Zero 18. : A phase shift oscillator uses which components to create a phase shift? (A) Resistors only (B) Inductors and capacitors (C) Resistors and capacitors (D) Diodes and capacitors 19. : Which amplifier configuration has a voltage gain less than 1? (A) Common emitter (B) Common base (C) Common collector (D) Differential amplifier 20. : A transistor in active region behaves like a: (A) Switch (B) Variable resistor (C) Amplifier (D) Short circuit 21. : Which component blocks DC but allows AC to pass? (A) Diode (B) Resistor (C) Capacitor (D) Transformer 22. : Which parameter determines the sharpness of a resonance in a circuit? (A) Gain (B) Frequency (C) Quality factor (Q) (D) Slew rate 23. : What is the role of an emitter resistor in a BJT amplifier? (A) Increase current (B) Reduce voltage (C) Stabilize biasing (D) Boost gain 24. : In a BJT, current flows from: (A) Emitter to collector (B) Collector to emitter (C) Base to emitter (D) Base to collector 25. : A Class A amplifier conducts for: (A) 90° of input cycle (B) 180° of input cycle (C) 270° of input cycle (D) 360° of input cycle Related Posts:Analog Integrated Electronics MCQsAnalog vs. Digital signals MCQsTypes of Computers (Analog, Digital, Hybrid) MCQsAnalog Integrated Circuits – MCQsResearch Topics Ideas of Analog and Digital CommunicationPresentation Topics of Analog and Digital Communication