Q. Optocoupler consists of a phototransistor and a led.

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Q. When an open circuited pn junction is illuminated then _________________

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Q. Photoconductors are made of _______

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Q. Phototubes are very quick in response to light.

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Q. Commonly used photoemissive material is _______

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Q. Photoconductive transducers produce output ________

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Q. Photoelectric transducers consist of _______

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Q. Optical radiations involve _________

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Q. A quartz crystal is _________

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Q. Microphone converts light into heat.

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Q. A piezoelectric transducer is used as an ignition source for a cigarette.

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Q. A piezoelectric transducer has a _________

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Q. In kitchen applications a piezoelectric crystal is used for _________

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Q. When a compressive force is applied to a quartz crystal then ____________

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Q. Piezoelectric transducer consists of _________

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Q. Piezoelectric crystals produce _________

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Q. Piezoelectric crystals __________

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Q. Piezoelectric transducer is used for measuring __________

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Q. For accurate temperature measurement in a thermocouple the __________

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Q. Which of the following should satisfy for measuring higher temperatures using a thermocouple?

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