Q. Opto-isolator uses a source of light for transmission, most commonly “near infrared light emitting diodes”.

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Q. Recombination of charge carriers in an LED, releases some energy which comes out in the form of light.

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Q. Which alloy is used for red, orange and yellow LED’s?

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Q. Which alloy is used for green blue and white LED’s?

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Q. Who was/were awarded with noble prize in physics in the year 2014 for the invention of blue light emitting diodes?

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Q. Who developed the first Light emitting diode?

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Q. A TRIAC (Triode alternating current) cannot perform switching action on DC voltage.

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Q. What is the full form of SCR?

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Q. How many layers of semiconductor does a TRIAC (Triode alternating current) have?

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Q. TRIAC (Triode alternating current) is unipolar device.

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Q. TRIAC can act as AC switch.

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Q. TRIAC is a unidirectional device.

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Q. Which is an example of TRIAC?

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Q. How many doped regions do a standard TRIAC have?

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Q. How many terminals does a TRIAC (Triode alternating current) have?

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Q. How many minimum thyristors make up a TRIAC (Triode alternating current)?

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Q. DIAC’s do not work with DC voltage.

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Q. What is the full form of TRIAC?

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Q. What is the full form of DIAC?

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Q. DIAC’s get damaged when voltage of wrong polarity is applied at its terminals.

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