EDC Quiz 3
Authored by Poornima Dhandapani
Engineering
University
Used 6+ times
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20 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The resistance of an LDR ______ when light intensity increases.
Increases
Decreases
Remains constant
First increases then decreases
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which material is commonly used in LDR construction?
Silicon
Germanium
Cadmium Sulfide (CdS)
Gallium Arsenide
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The phenomenon responsible for light emission in LED is:
Thermionic emission
Electroluminescence
Photoluminescence
Field emission
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which characteristic is NOT typical of LASER light?
Coherence
Monochromaticity
High divergence
High intensity
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A photodiode operates in:
Forward bias only
Reverse bias only
Both forward and reverse bias
Zero bias only
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The current generated in a photodiode is proportional to:
Applied voltage
Temperature
Light intensity
Resistance
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A phototransistor provides ______ compared to a photodiode.
Lower sensitivity
Higher current gain
Faster response time
Lower output current
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