PHOTODIODE...

PHOTODIODE

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A diode which converts light energy into electrical energy .

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(i) three photodiodes D_(1),D_(2) and D_(3) are made of semiconductors ahving band gaps of 2.5 eV 2eV and 3eV respecitvely which of them will not be able to detect light of wavelenghth 600nm (ii) why phtoodiodes are required to operate in revese bias explain

State the reason, why the photodiode is always operated under reverse bias. Write the working principle of operation of a photodiode. The semiconducting material used to fabricate a photodiode, has an energy gap of 1.2 eV. Using calculations, show whether it can detect light of wavelength of 400nm incident on it

Assertion: A P-N photodiode is made from a semiconductor for which E_(g)=2.8 eV . This photo diode will not detect the wavelength of 6000 nm . Reason: A PN photodiode detect wavelength lambda if (hc)/(lambda)gtE_(g) .

Statement-I : A p-n junction with reverse bias can be used as a photodiode to measure light intensity. Statement-II : In a reverse bias condition the current in small but it is more sensitive to changes in incident light intensity.

Why is a photodide operated in reverse bias mode? Fig. shown reverse bias current, under different illuminating intensities I_(1)I_(2),I_(3) and I_(4) for a given photodiode. Average the intensities I_(1), I_(2),I_(3) and I_(4) in decreasing order of wavelength.

MODERN PUBLICATION-SEMICONDUCTOR ELECTRONICS METERIALS DEVICES AND SIMPLE CIRCUITS -REVISION EXERCISES (VERY SHORT ANSWER QUESTION)

What is the order of reverse current in a reverse biased p-n junctio...
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Name the junction diode whose I-V characteristics are shown adjoining
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PHOTODIODE
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Draw a p-n junction with reverse bias
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Why are photodiodes used preferably in reverse bias condition?
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Why germainum is preferred to silicon for making seimiconductor dev...
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Name the semiconductor device that can be used to regulate an irregula...
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Compare the working principal of an LEF and a photodiode
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What is dark current
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P-N-P TRANSISTOR
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In a transistor emitter-base junction is always forward biased while t...
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What is the function of base region of a transistor? Why is this regio...
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In a common base transistor what is the phase relationship between inp...
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In a common emitter amplifier , the phase difference between the input...
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Why a common emitter amplifer is preferred toa common base amplifi...
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In n-p-n transistor, what are the current carriers inside and outside ...
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In n-p-n transistor, what are the current carriers inside and outside ...
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Derive a relation between current gain of common emitter amplifier.
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State the relation for the voltage gain in terms of trans-conductance,...
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What will be the total voltage amplification factor when three ampli...
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