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Semiconductor D...

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  • Question 1
    4 / -1

    Different voltages are applied across a p-n junction and the currents are measured from each value. Which of the following graphs is obtained between voltage and current?

  • Question 2
    4 / -1

    The relation between the energy Ef of Fermi level, height Eb of potential barrier and work function Wo is

  • Question 3
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    If the height of potential barrier in a metal is Eb and Fermi energy is Ef, then the minimum energy to remove an electron from the metal will be

  • Question 4
    4 / -1

    In the presence of space charge in the diode valve the plate current is 10 mA at the plate voltage 50 V. Then the plate current at plate voltages 200 V will be

  • Question 5
    4 / -1

    In a triode valve

  • Question 6
    4 / -1

    The value of plate resistance of a triode is 3 × 103 Ω and its mutual conductance factor is 1.5 millimho, then its amplification factor will be

  • Question 7
    4 / -1

    If the amplification factor of a triode valve is 100, then at plate potential of 250 volt the cut off voltage of its grid will be

  • Question 8
    4 / -1

    When the plate voltage of a triode is 150 V, its cut off voltage is –5V. On increasing the plate voltage to 200 V, the cut off voltage can be

  • Question 9
    4 / -1

    In vacuum diode for plate potential is gradually varied from – 200 V to 200 V. How will the plate current vary?

  • Question 10
    4 / -1

    At a constant plate potential, if the grid is moved closer to the plate, the amplification factor of triode

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