Chapter 13 PHOTO-SENSITIVE BJT & LIGHT ACTIVATED SILICON CONTROL RECTIFIER (LASCR) MCQs

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1. . In a phototransistor, base current is





2. . A large secondary current _________________ in n-p-n InGaAs phototransistor is achieved.





3. . Which of the following is the difference between the n-p-n and conventional bipolar transistor?





4. . The n-p-n hetero-junction phototransistor is grown using ______________





5. . What is the main benefit of the waveguide structure over conventional heterojunction phototransistor?





6. . Solid State Relays (SSRs) have a





7. . An LED and phototransistor is equivalent to a/an





8. . Optocoupler is otherwise known as





9. . When the emitter junction is forward biased while the collector junction is reverse biased, the transistor is at ________ region.





10. . Which of the following has the highest input impedance





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