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12th Standard English Medium Physics Subject Electronics and Communication Book Back 2 Mark Questions with Solution Part - I Question Bank Software May-31 , 2021

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12th Standard English Medium Physics Subject Electronics and Communication Book Back 2 Mark Questions with Solution Part - I

12th Standard English Medium Physics Subject Electronics and Communication Book Back 2 Mark Questions with Solution Part - I

12th Standard

    Reg.No. :
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Physics

Time : 00:30:00 Hrs
Total Marks : 10

    Part I

    5 x 2 = 10

  1. Discuss the biasing polarities in an NPN and PNP transistors

  2. What is the phase relationship between the AC input and output voltages in a common emitter amplifier? What is the reason for the phase reversal?

  3. Give circuit symbol, logical operation, truth table, and Boolean expression of
    i) AND gate
    ii) OR gate
    iii) NOT gate
    iv) NAND gate
    v) NOR gate and
    vi) EX-OR gate.

  4. Define bandwidth of transmission system.

  5. What is mobile communication?

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