COMPUTER ARCHITECTURE
INPUTOUTPUT DEVICES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Digital
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Analog
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Either A or B
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None of the above
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Detailed explanation-1: -Photocell Overview The photocell, sometimes referred to as a photoresistor or light-dependent resistor (LDR), is a two-terminal, resistive component that increases or decreases its resistance depending on the light it senses.
Detailed explanation-2: -There are three types of photocells, Photoemissive, Photovoltaic, and Photoconductive. They are mainly based on the photoelectric effect, which is when energy in any form is supplied to a sensitive material, the material emits an electron, the energy can be in the form of light, heat, etc.
Detailed explanation-3: -Analog sensors that are used for detecting the amount of light striking the sensors are called as light sensors. These analog light sensors are again classified into various types such as photo-resistor, Cadmium Sulfide (CdS), and, photocell.