Light Sensors_2 Objective Questions:


Ques 1. The following is (are) type(s) of Hall Effect sensors.
a) Linear Hall Effect sensor
b) Threshold Hall Effect sensor
c) Both a) and b)
d) None of the above

Answer: c

Ques 2. Following is (are) true for Hall Effect sensors.

a) They can operate as switches of high frequency
b) They cost less than electromechanical switches
c) They are free from contact bounce problem
d) All of the above

Answer: d

Ques 3. A piezo-electrical crystal generates voltage when subjected to ____ force.

a) Electrical
b) Mechanical
c) Gravity
d) All of the above

Answer: b

Ques 4. Hall Effect sensors are used in
a) Flow meter
b) Fuel level indicator
c) Both a) and b)
d) None of the above

Answer: c

Ques 5. Following is (are) the type(s) of Light sensor(s)

(a) Photo sensor
(b) Photo transistors
(c) Photo conductors
(d) All of the above


Answer: d

Ques 6. Following type of sensors are used to generate information in object grasping and obstacle avoidance.
a) Ferro magnetic
b) Diamagnetic
c) Paramagnetic
d) All of the above
 Answer: b

Ques 7. Following acts as detector in Optical sensor

a) Light emitting diode
b) Photo diode
c) Transistor
d) All of the above

Answer: b

Ques 8.Inductive proximity sensors can be effective only when the objects are of _____ materials.
a) Ferro magnetic
b) Diamagnetic
c) Paramagnetic
d) All of the above
Answer: a

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These are most asked Light Sensors mcqs with answers and most important light Sensors  interview and Viva question.
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