Electronic Circuit Design – MCQs

1. : What is the primary purpose of a voltage divider in circuit design?
(A) To increase voltage
(B) To regulate current
(C) To produce a desired fraction of the input voltage
(D) To filter signals

2. : Which component is commonly used to store energy in a circuit?
(A) Resistor
(B) Transistor
(C) Capacitor
(D) Diode

3. : An operational amplifier (op-amp) has high:
(A) Output resistance
(B) Input impedance
(C) Frequency response
(D) Capacitance

4. : What is the function of a bypass capacitor in amplifier circuits?
(A) Increase gain
(B) Reduce power
(C) Short AC signals to ground
(D) Store energy

5. : In a common-emitter amplifier, the input is applied to:
(A) Base
(B) Collector
(C) Emitter
(D) Substrate

6. : Which of the following is a linear circuit component?
(A) Diode
(B) Transistor
(C) Inductor
(D) SCR

7. : What is the typical value of voltage gain for an inverting op-amp with Rf = 10kΩ and Rin = 2kΩ?
(A) -2
(B) -5
(C) 2
(D) 5

8. : Which tool is commonly used to simulate electronic circuits?
(A) Python
(B) SPICE
(C) Arduino
(D) Excel

9. : What type of filter passes low frequencies and blocks high frequencies?
(A) High-pass filter
(B) Low-pass filter
(C) Band-stop filter
(D) Band-pass filter

10. : In PCB design, what does “via” refer to?
(A) A voltage regulator
(B) A ground terminal
(C) A hole connecting different layers
(D) A type of capacitor

11. : Which component can amplify a signal?
(A) Capacitor
(B) Diode
(C) Resistor
(D) Transistor

12. : What is the purpose of a heat sink in power electronic circuits?
(A) Reduce voltage
(B) Increase resistance
(C) Dissipate heat
(D) Amplify signal

13. : The main drawback of using a breadboard for circuit design is:
(A) It cannot hold components
(B) Poor reliability for high-frequency circuits
(C) It requires soldering
(D) Only for analog circuits

14. : What does the slew rate of an op-amp indicate?
(A) Power supply range
(B) Frequency range
(C) Maximum rate of change of output voltage
(D) Input resistance

15. : A Zener diode is used in circuits for:
(A) Amplification
(B) Rectification
(C) Voltage regulation
(D) Oscillation

16. : What kind of signal does a Wien bridge oscillator generate?
(A) Square wave
(B) Triangular wave
(C) Pulse wave
(D) Sine wave

17. : Which configuration offers the highest voltage gain in BJT amplifiers?
(A) Common base
(B) Common collector
(C) Common emitter
(D) Emitter follower

18. : Which IC is known as a timer IC?
(A) LM317
(B) 555
(C) 741
(D) 7805

19. : Negative feedback in an amplifier results in:
(A) Increased gain
(B) Decreased stability
(C) Improved linearity
(D) More distortion

20. : What does the term “biasing” in transistor circuits refer to?
(A) Increasing output
(B) Applying voltage for proper operation
(C) Shorting the base
(D) Amplifying the signal

21. : A Schmitt trigger is used for:
(A) Filtering signals
(B) Voltage multiplication
(C) Signal conditioning with hysteresis
(D) Current amplification

22. : The primary purpose of a differential amplifier is to:
(A) Output constant voltage
(B) Compare two input voltages
(C) Rectify AC
(D) Amplify single-ended signals

23. : In multivibrators, what kind of waveform is typically generated?
(A) Sine
(B) Square
(C) Ramp
(D) Sawtooth

24. : Which logic family is known for low power consumption?
(A) TTL
(B) CMOS
(C) ECL
(D) RTL

25. : Which instrument is primarily used to observe waveforms in circuit design?
(A) Multimeter
(B) Oscilloscope
(C) Function generator
(D) Voltmeter