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Question

Give the working principle of the following
a photodiode
B solar cell
c zener diode
D light emitting diode
( give Only working principle not working)

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Solution

Dear Student,
A photodiode is a kind of light detector, which involves the conversion of light into voltage or current, based on the mode of operation of the device. ... It produces photocurrent by generating electron-hole pairs, due to the absorption of light in the intrinsic or depletion region.Photovoltaic modules, commonly called solar modules, are the key components used to convert sunlight into electricity. ... Light striking the crystals induces the photovoltaic effect, which generates electricity. The electricity produced is called direct current (DC) and can be used immediately or stored in a battery.Working of the Zener diode is similar to a PN junction diode in forward biased condition, but the uniqueness lies in the fact that it can also conduct when it is connected in reverse bias above its threshold / breakdown voltage. These are among the basic types of diodes used frequently, apart from the normal diodes.A light-emitting diode is a two-lead semiconductor light source. It is a pn junction diode that emits light when activated. When a suitable voltage is applied to the leads, electrons are able to recombine with electron holes within the device, Regards

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