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WorksheetsPhotoresistor and phototransistor sensor
Total questions: 15
Worksheet time: 8mins
Photoresistor sensor is made of a _________________ material
Insulator
Conductor
Semiconductor
A photoresistor is an electronic component whose electrical resistance ________________________________when it is exposed to light.
changes
increases
doesn't change
Phototransistor sensor is a __________________ that reacts to brightness
sensor
feeler
indicator
To build a light barrier in a car parking gate mechanism we need a _____________ .
Photoresistor sensor
Phototransistor sensor
We use a __________________ to switch off the light automatically.
Photoresistor sensor
Phototransistor sensor
The output of the _________________ is only one or zero.
digital sensor
passive sensor
A sensor that has a negative pole and a positive pole it means it has ___________.
resistance
polarity
Resistance of photoresistor sensor is low in brightness
True
False
Phototransistor sensor is an indicator for the brightness of the light.
True
False
Phototransistor sensor doesn't have polarity
True
False
To build a light barrier in a hand dryer mechanism we need a _____________
Photoresistor sensor
Phototransistor sensor
Light sensor doesn't have polarity
True
False
Photoresistor sensor is an insulator in darkness.
True
False
A semiconductor material has an electrical conductivity value falling between that of a conductor, such as metallic copper, and an insulator, such as glass.
True
False
The Photoresistor sensor, which is an analog brightness sensor, reacts to daylight and changes its resistance value due to this. This is an indicator for the brightness of the light.
True
False
