Question

Difference between photocell and photovoltaic cell

Answer 1

Structurally, it is common for photocells to be made from cadmium sulfide, and for photovoltaic cells to be made from silicon.

"Photocell" usually means a Light Dependent Resistor (LDR). It's a device whose electrical resistance changes with the amount of light present. Since resistors do not generate a voltage or current by themselves, a separate power supply is required for a photocell to be useful. They are usually used like a switch, to turn a circuit on or off when the amount of light is above or below a preset level.

Photovoltaic cells do generate a voltage or current which increases according to the amount of light present. People are often referring to solar cells, which convert light into electrical power, when they say "photovoltaic cell". A photovoltaic cell may also refer to a photodiode, which outputs a small electrical signal that may be used as a measure of the light level.

Hope this help

Answer 2

We have to write the difference between the photocell and photovoltaic cell.

Photocell :

• It is light sensitive resistor.
• It detects light energy.
• It is very small not more than half an inch appliance.
• It is used in light meters, camcorders and cameras etc.
• At night, city street light automatic turns on light because of it.
• It is also used as safety sensor in factories. when an object blocks the light, power is cut automatically.

Photovoltaic cell :

• It is nothing but classed semiconductor.
• When light hits the photovoltaic cell, It produces electrical energy.
• photovoltaic cell are large, at least 20 square inch to be useful.
• It is used to power low voltage device such as calculator, torches, emergency light etc.
• It is also used to charge batteries which can be used in our everyday life.

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