Discussion
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- Question
Which is the DIAC?
Options- A.
- B.
- C.
- D.
- Correct Answer
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- 1. What is an SCR?
Options- A. a PNPN thyristor with 3 terminals
- B. a PNPN thyristor with 4 terminals
- C. a PNP thyristor with 3 terminals
- D. an NPN thyristor with 3 terminals Discuss
- 2. Which is the seven-segment display?
Options- A.
- B.
- C.
- D.
Discuss
- 3. When checking a good SCR or TRIAC with an ohmmeter it will:
Options- A. show high resistance in both directions
- B. show low resistance with positive on anode and negative on cathode, and high resistance when reversed
- C. show high resistance with negative on anode and positive on cathode, and low resistance when reversed
- D. show low resistance in both directions Discuss
- 4. The DIAC is a:
Options- A. transistor
- B. unidirectional device
- C. three-layer device
- D. bidirectional device Discuss
- 5. What type of application would use a photovoltaic cell?
Options- A. an automobile horn
- B. a TI 92 calculator
- C. a magnetic field detector
- D. a remote power source Discuss
- 6. A TRIAC:
Options- A. can trigger only on positive gate voltages
- B. can trigger only on negative gate voltages
- C. cannot be triggered with gate voltages
- D. can be triggered by either a positive or a negative gate voltage Discuss
- 7. A UJT has:
Options- A. two base leads
- B. one emitter lead
- C. two emitter leads and one base lead
- D. one emitter lead and two base leads Discuss
- 8. A transducer's function is to:
Options- A. transmit electrical energy
- B. convert energy
- C. produce mechanical energy
- D. prevent current flow Discuss
- 9. The smallest amount of current that the cathode-anode can have, and still sustain conduction of an SCR is called the:
Options- A. maximum forward current
- B. maximum forward gate current
- C. holding current
- D. reverse gate leakage current Discuss
- 10. The PUT (programmable unijunction transistor) is actually a type of:
Options- A. UJT thyristor
- B. FET device
- C. TRIAC
- D. SCR Discuss
Thyristors and Tranducers problems
Search Results
Correct Answer: a PNPN thyristor with 3 terminals
Correct Answer:
Correct Answer: show high resistance in both directions
Correct Answer: bidirectional device
Correct Answer: a remote power source
Correct Answer: can be triggered by either a positive or a negative gate voltage
Correct Answer: one emitter lead and two base leads
Correct Answer: convert energy
Correct Answer: reverse gate leakage current
Correct Answer: UJT thyristor
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