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Draw the V-I characterisitics of p-n jun...

Draw the V-I characterisitics of p-n junction diode in forward bias and in reverse bias.

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In a p-n junction , forward biasing is applied by connecting +ve of the battery to p-section and -ve of the battery of n-section. In the case of reverse biasing, +ve of the battery is connected to n-section and -ve of the battery is connected to p-section . As a result, the strength of the current carriers moving in the circuit will

change. It can be used by taking the arrangement to use it as half or full wave rectifier or in any other form. A graph between voltage and current for forward bias and reverse bias is as shown in the fig. From the fig., we find that during forward bias, the p-n junction offers less resistance and during reverse bias it offers large resistance.
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(a). Explains briefly with the help of a circuit diagram how V-I characteristics of a p-n junction diode are obtainedin (i) forward bias, and (ii) reverse bias. (b). A photo diode is fabricated from a semiconductor with a band gap of 2.8 EV. Can it detect wave length of 6000. nm? Justify.

Explain the working of p-n junction diode in forward and reverse biased mode.

Knowledge Check

  • p-n junction in reverse bias behaves like

    A
    an inductor
    B
    a condenser
    C
    amplifier
    D
    an off switch

  • Which of the following pn junction is not used in reverse bias?

    A
    LED
    B
    Solar cell
    C
    Zener diode
    D
    Both (1) & (2)

  • Assertion : The dominant mechanism for motion of charge carreis in forward and reverse biased silicon P-N junction are drit in both forward and reverse bias. Reaon : In reverse biasing, no current flow through the junction.

    A
    If both assertion and reason are true and the reason is the correct explanation of the assertion
    B
    If both assertion and reason are true but the reason is not the correct explanation of the assertion
    C
    If assertio is true statement but reason is false.
    D
    If both assertion and reason are false statement

    • Similar Questions

    Explore conceptually related problems

    Explain briefly, with the help of circuit diagram , how V-I characteristics of a p-n junction diode are obtained in (i) forward bias, and (ii) reverse bias. Draw the shapes of the characteristic curves obtained. Or Explain briefly, with the help of necessary diagrams, the forward and the reverse biasing of a p-n junction diode. Also draw their characteristic curves in the two cases.

    In V-I characteristics of a p-n junction diode, why is the current under reverse bias almost independence of the applied potential upto a critical voltage?

    Draw V-I characterictics of a p-n junction diode. 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 graph showing the variation of current with voltage for a p-n junction diode in forward bias as well as revese bias arrangements.

    (a) Draw the V-I characteristic curve for forward and reverse bias of a p-n juction diode (b) what are th majority and ninority carriers in a p type semiconductor (c ) wirte down the symbol and truth table of OR gate

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