Circuits and Resonance Questions and Answers
Circuits and Resonance questions with answers are a major topic in electronics aptitude tests and engineering exams such as GATE, DRDO, and campus placements. These aptitude questions and answers focus on AC/DC circuits, impedance, phase difference, and resonance conditions. Understanding how current and voltage behave at resonance is essential for electrical and electronics engineers. Practicing circuit analysis and resonance problems with detailed solutions improves both theoretical knowledge and practical application. Access aptitude questions with solutions PDF to prepare effectively for technical and placement tests.
Circuits and Resonance
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50 questions
21. In a CE amplifier, the input impedance is primarily determined by:
- Collector resistor
- Base resistor
- Emitter resistor
- Load resistor
23. The resonant frequency of a tank circuit is given by:
- 1/2πRC
- 1/2π√LC
- 2π/√LC
- RC/2π
24. In a voltage divider bias circuit, the purpose of emitter resistor is:
- Increase gain
- Provide thermal stability
- Reduce noise
- Block DC
25. What is the typical input impedance of an op-amp?
- Very low
- About 1kΩ
- About 10kΩ
- Very high
27. In a clipper circuit, the diode is used to:
- Amplify signals
- Generate oscillations
- Clip waveform portions
- Regulate voltage
28. What is the function of a clamper circuit?
- Amplify AC signals
- Shift DC level
- Filter noise
- Generate pulses
29. The h-parameter equivalent circuit is used for:
- Power analysis
- Large signal analysis
- Small signal analysis
- DC analysis only
30. In a Colpitts oscillator, the feedback is obtained from:
- Inductive divider
- Capacitive divider
- Resistive divider
- Transformer coupling