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Electronic Mechanic Set-1
Opto Electronics
15

Opto Electronics MCQ with Answers

15) Which of the device is opto-coupled TRIACS?

BT136

B3202

2N2648

MOC3020

Answer is:

B3202

Opto Electronics MCQ with Answers

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Related Opto Electronics MCQ with Answers

16) Which is the combination of photo transistor?

LASER diode and pin diode

Photo transistor and DIAC

Photo diode and transistor

Photo resistor and TRIAC

Answer is:

Photo diode and transistor

17) What is the advantage of photo transistors over photo diodes?

Considerably lower sensitivity

Limit voltage handling capacity

Considerable greater sensitivity

Vulnerable to electrical sources

Answer is:

Considerable greater sensitivity

18) What is the use of photo transistor?

Used in comparator circuit

Used as light controlled switch

Used as oscillator

Used as demodulator

Answer is:

Used as light controlled switch

19) What is the drawbacks of LDR?

More sensitive

Available different sizes and specifications

Cannot be used to determine precise light levels

Made of low resistance material with few holes

Answer is:

Cannot be used to determine precise light levels

What is the drawbacks of LDR?

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