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CSE :: Electronic Principles

  1. Molecule is

  2. A.
    The smallest particle of a substance that retains the properties of that substance
    B.
    A atom that has a shortage of electrons in its outer orbit
    C.
    A atom that has an excessive number of electrons in its outer orbit
    D.
    A atom that flows whenever there is an imbalance of electrical charges between two points
    E.
    None of the above

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  3. What form of energy is used for creating static electricity?

  4. A.
    Solar energy
    B.
    Mechanical energy
    C.
    Chemical energy
    D.
    Light energy
    E.
    None of the above

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  5. Suppose the zener diode has a breakdown voltage of 10 V and zener resistance of 8.5 W, what is the additional voltage when the current is 20 mA?

  6. A.
    0.17 V
    B.
    10.17 V
    C.
    20 V
    D.
    18.8 V
    E.
    None of the above

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  7. A transistor has a current gain of 125 and a base current of 30 µA. What is the collector current?

  8. A.
    3.75 mA
    B.
    3.2 mA
    C.
    0.05 mA
    D.
    13 mA
    E.
    None of the above

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  9. A dielectric material is:

  10. A.
    a good conductor
    B.
    a good insulator
    C.
    a poor conductor of electrostatic fields
    D.
    a good conductor of magnetic fields
    E.
    None of the above

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  11. A certain electromagnet has 1000 turns of wire. How much current must flow through the coil in order to generate an mmf of 100 ampere-turns?

  12. A.
    0.1 A
    B.
    1000 A
    C.
    10 A
    D.
    100 A
    E.
    None of the above

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  13. If a load resistance is 1 kW, a stiff current source has a resistance of

  14. A.
    At least 10 Ohm
    B.
    Less than 10 Ohm
    C.
    More than 100 k Ohm
    D.
    Less than 100 k Ohm
    E.
    None of the above

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  15. A flashlight battery has internal resistance of 1W. For what values of load resistance does the flashlight battery appear stiff?

  16. A.
    60 Ohm
    B.
    50 Ohm
    C.
    100 Ohm or more
    D.
    10 Ohm
    E.
    None of the above

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  17. The number of free electrons and holes in intrinsic semiconductor increases when the temperature

  18. A.
    Decreases
    B.
    Increases
    C.
    Stays the same
    D.
    0oC
    E.
    None of the above

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  19. Which one of the following statements is true for current flowing in a parallel circuit?

  20. A.
    The amount of current flow through each branch of a parallel circuit can be different, depending on the resistance of each branch part and the amount of voltage applied to it
    B.
    The same current always flows through every part of a parallel circuit
    C.
    The total current in a parallel circuit is equal to the total voltage multiplied by the total resistance
    D.
    The total current in a parallel circuit is always less than the smallest amount of current
    E.
    None of the above

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