Transistors and Applications Questions and Answers
Transistors are semiconductor devices that amplify and switch electronic signals, forming the foundation of most circuits. They are a frequent topic in aptitude questions and answers for GATE, ISRO, and core electronics placement exams. Understanding NPN and PNP transistor configurations, biasing, and current amplification helps analyze circuit behavior effectively. By practicing transistor aptitude questions with solutions PDF, aspirants can improve their conceptual clarity and application skills, which are crucial for clearing electronics-based technical exams and interviews.
Transistors and Applications
Showing 10 of
50 questions
31. Which type of biasing is used for thermal stability in power amplifiers?
- Fixed bias
- Collector feedback
- Diode compensation
- Voltage divider
32. In a class B amplifier, crossover distortion is caused by:
- Non-linear transistors
- Power supply ripple
- Both transistors off during zero crossing
- Temperature variations
34. Which transistor parameter is most temperature sensitive?
- Current gain (β)
- Base-emitter voltage
- Reverse saturation current
- Collector resistance
35. In a multistage amplifier, overall bandwidth is determined by:
- First stage
- Last stage
- Narrowest bandwidth stage
- Widest bandwidth stage
36. What is the purpose of Miller compensation in op-amps?
- Increase bandwidth
- Improve stability
- Reduce power consumption
- Increase gain
37. Which type of feedback increases input impedance?
- Shunt feedback
- Series feedback
- Voltage feedback
- Current feedback
38. In a transistor, the Early effect refers to:
- Temperature effect on β
- Base width modulation with VCB
- Early breakdown
- Storage time effect
39. What is the typical value of transition capacitance in small signal transistors?
- 0.1-1 pF
- 1-10 pF
- 10-100 pF
- 100-1000 pF
40. Which amplifier class has the highest efficiency?
- Class A
- Class B
- Class C
- Class D