Thyristors and Transducers Questions and Answers
Thyristors and transducers questions with answers help electronics aspirants understand key control and measurement devices used in power electronics and instrumentation. These reasoning questions for competitive exams cover SCRs, TRIACs, DIACs, phototransistors, and various transducer principles. Practicing logical reasoning questions based on these components builds clarity on signal conversion, triggering methods, and voltage control. Engineering students preparing for GATE, ISRO, BEL, or placement exams can enhance their technical reasoning and conceptual understanding with these reasoning questions and answers, ensuring they perform confidently in both objective and practical assessments.
Thyristors and Transducers
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35 questions
21. Three different points are shown on a dc load line. The upper point represents the
- minimum current gain
- quiescent point
- saturation point
- cutoff point
22. Which of the following conditions are needed to properly bias an npn transistor amplifier?
- Forward bias the base/emitter junction and reverse bias the base/collector junction.
- Forward bias the collector/base junction and reverse bias the emitter/base junction.
- Apply a positive voltage on the n-type material and a negative voltage on the p-type material.
- Apply a large voltage on the base.
23. Often a common-collector will be the last stage before the load; the main function of this stage is to
- provide voltage gain
- buffer the voltage amplifiers from the low-resistance load
- provide phase inversion
- provide a high-frequency path to improve the frequency response
24. In order for feedback oscillators to have any practical value, the gain has to be
- < 1
- self-adjusting
- stabilized
- nonlinear
25. To get a negative gate-source voltage in a self-biased JFET circuit, you must use a
- voltage divider
- source resistor
- ground
- negative gate supply voltage
27. If the drain, source, and channel of a MOSFET are all a p-type material, and it operates in both modes, this is an n-channel D-MOSFET.
- TRUE
- FALSE
28. A practical CE amplifier has the input on the base and the output taken off the emitter.
- TRUE
- FALSE
29. Base currents are usually small because of the physical construction of the thin and lightly doped base.
- TRUE
- FALSE
30. The beta of a BJT is the ratio of collector current to emitter current.
- TRUE
- FALSE