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
11. Once a DIAC is conducting, the only way to turn it off is with:
- a positive gate voltage
- a negative gate voltage
- low-current dropout
- breakover
12. The DIAC is a:
- transistor
- unidirectional device
- three-layer device
- bidirectional device
13. What type of application would use an injection laser diode?
- a 10BASE-T Ethernet
- a liquid crystal display
- a fiber optic transmission line
- a good flashlight
14. The PUT (programmable unijunction transistor) is actually a type of:
- UJT thyristor
- FET device
- TRIAC
- SCR
15. A transducer's function is to:
- transmit electrical energy
- convert energy
- produce mechanical energy
- prevent current flow
16. The primary function of the bias circuit is to
- hold the circuit stable at VCC
- hold the circuit stable at vin
- ensure proper gain is achieved
- hold the circuit stable at the designed Q-point
17. A JFET
- is a current-controlled device
- has a low input resistance
- is a voltage-controlled device
- is always forward-biased
18. The capacitor that produces an ac ground is called a(n)
- coupling capacitor
- dc open
- bypass capacitor
- ac open
19. In a class B push-pull amplifier, the transistors are biased slightly above cutoff to avoid
- crossover distortion
- unusually high efficiency
- negative feedback
- a low input impedance
20. The depletion-mode MOSFET
- can operate with only positive gate voltages
- can operate with only negative gate voltages
- cannot operate in the ohmic region
- can operate with positive as well as negative gate voltages