Physical electronics devices and ics miscellaneous

Physical electronics devices and ics miscellaneous

Easy Questions

Physical Electronics Devices and ICs

Physical electronics devices and ics miscellaneous
  1. A load line is a graph between—








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    A load line is a graph between IC and VCE.

    Correct Option: B

    A load line is a graph between IC and VCE.

  1. In a transistor if α = 0.9, β will be equal to—








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    Given α = 0.9
    ∴ β = α 1 – α = 0.9 1 – 0.9 = 9

    Correct Option: D

    Given α = 0.9
    ∴ β = α 1 – α = 0.9 1 – 0.9 = 9

  1. For a transistor, the current gain relation between CB current gain a and CE current gain b is—








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    For a transistor, the current gain relation between CB current gain a and CE current gain β is β = α 1 – α
    or α = β (1 – α)

    Correct Option: A

    For a transistor, the current gain relation between CB current gain a and CE current gain β is β = α 1 – α
    or α = β (1 – α)

  1. For a transistor β = 40 and IB = 25 µA, the value of IE is—








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    Given, β = 40 S IB = 25µA
    ∴ IC = βIB = 40 25 µA = 1000 µA
    IE = IB + IC = 25µA + 100µA = 1.025 mA

    Correct Option: C

    Given, β = 40 S IB = 25µA
    ∴ IC = βIB = 40 25 µA = 1000 µA
    IE = IB + IC = 25µA + 100µA = 1.025 mA

  1. Most of the transistors are npn type and not pnp type because—








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    Mostly npn transistors are preferred over pnp transistors because the mobility of electron is approximately 2.5 times greater than the mobility of hole, corresponding we can have high conduction in npn transistors.

    Correct Option: D

    Mostly npn transistors are preferred over pnp transistors because the mobility of electron is approximately 2.5 times greater than the mobility of hole, corresponding we can have high conduction in npn transistors.