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प्रश्न
With reference to Semiconductor Physics,
Name the process that causes depletion region in a p-n junction.
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उत्तर
Diffusion of electrons of n-type crystal into holes of p-type crystal.
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संबंधित प्रश्न
Write briefly the important processes that occur during the formation of p−n junction. With the help of necessary diagrams, explain the term 'barrier potential'.
Draw V − I characteristics of a p-n junction diode. Answer the following questions, giving reasons:
(i) Why is the current under reverse bias almost independent of the applied potential up to a critical voltage?
(ii) Why does the reverse current show a sudden increase at the critical voltage?
Name any semiconductor device which operates under the reverse bias in the breakdown region.
Draw the circuit diagram of a full wave rectifier using p-n junction diode.
Explain its working and show the output, input waveforms.
An ideal diode should pass a current freely in one direction and should stop it completely in the opposite direction. Which is closer to ideal-vacuum diode or a p-njunction diode?
Explain how a potential barrier is developed in a p-n junction diode.
Explain the three processes involved in the working of a solar cell.
Which one of the following is not the advantage of LED?
Consider the following statements (A) and (B) and identify the correct answer.
- A Zener diode is connected in reverse bias when used as a voltage regulator.
- The potential barrier of the p-n junction lies between 0.1 V to 0.3 V.
What energy conversion takes place in a solar cell?
Select the wrong statement in the case of LED.
