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
21. Which parameter determines the power handling capacity of a transistor?
- Current gain (β)
- Maximum collector current
- Transition frequency
- Input impedance
22. In a common collector configuration, voltage gain is approximately:
- 0.5
- 0.95
- 10
- 100
23. What is the purpose of heat sink in power transistors?
- Increase current gain
- Dissipate heat
- Provide electrical insulation
- Reduce noise
24. Which type of MOSFET has no channel in zero bias condition?
- Depletion MOSFET
- Enhancement MOSFET
- JFET
- Both depletion and enhancement
25. What is the typical cut-in voltage for germanium transistors?
- 0.1V
- 0.3V
- 0.7V
- 1.0V
26. In a transistor amplifier, distortion is primarily caused by:
- Non-linear transistor characteristics
- Power supply variations
- Temperature changes
- Load resistance
27. Which transistor configuration is used as impedance matching device?
- Common base
- Common emitter
- Common collector
- All configurations
28. What is the typical value of early voltage for modern transistors?
- 5-10V
- 50-200V
- 500-1000V
- 1000-5000V
29. In a differential amplifier, common mode rejection ratio (CMRR) indicates:
- Voltage gain
- Current gain
- Ability to reject common signals
- Power handling capacity
30. What is the main advantage of cascode amplifier?
- High input impedance
- High bandwidth
- Low power consumption
- Better thermal stability