Semiconductor Electronics: Materials, Devices and Simple Circuits

  • Question 1
    CBSEENPH12039428

    A student wants to use two p-n junction diodes to convert alternating current into direct current. Draw the labelled circuit diagram she would use and explain how it works.

    Solution

    The circuit of full wave rectifier is as shown below;

    Principle: The underlying working principle of full wave rectifier is that the p-n junction conducts when it is forward biased and does not condut when it is reverse biased.

    Question 2
    CBSEENPH12039429

    Give the truth table and circuit symbol for NAND gate.

    Solution
    NAND gate:Wired Faculty
    Question 3
    CBSEENPH12039430

    Draw the typical input and output characteristics of an n-p-n transistor in CE configuration. Show how these characteristics can be used to determine (a) the input resistance (ri), and (b) current amplification factor.

    Solution

    ri =VBEICVCEro =VCEICIBβac =ICIBVCE 

    Question 4
    CBSEENPH12039586

    A p–n junction (D) shown in the figure can act as a rectifier. An alternating current source (V) is connected in the circuit.

    Solution

    C.

    Only +ve current passes though the diode. Given figure is half wave rectifier.

    Sponsor Area

    Mock Test Series

    Sponsor Area

    NCERT Book Store

    NCERT Sample Papers

    Entrance Exams Preparation