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PN junction diode and NPN transistor

Quiz by Sowndarya

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8 questions
Show answers
  • Q1
    What is the function of the emitter in an NPN transistor?
    Injecting majority charge carriers into the base
    Amplifying the signal
    Blocking the flow of current
    Controlling the flow of current
    30s
  • Q2
    What happens when a forward bias voltage is applied to a PN junction diode?
    Current flows easily in the reverse direction
    The diode stops working
    Current flows easily in the forward direction
    No current flows in either direction
    30s
  • Q3
    What is the role of the collector in an NPN transistor?
    Modulating the input signal
    Providing mechanical support
    Amplifying the output signal
    Collecting majority charge carriers that pass through the base
    30s
  • Q4
    What happens to the resistance of a forward biased PN junction diode?
    It decreases
    It remains constant
    It becomes infinite
    It increases
    30s
  • Q5
    What is the purpose of the base region in an NPN transistor?
    Blocking the flow of current
    Generating the majority charge carriers
    Providing mechanical support
    Controlling the flow of current between the emitter and collector
    30s
  • Q6
    What is the symbol used to represent an NPN transistor in circuit diagrams?
    A square with two parallel lines inside
    A circle with a diagonal line through it
    A curved line with a dot at one end
    A triangle with an arrow pointing outwards
    30s
  • Q7
    What happens when a reverse bias voltage is applied to a PN junction diode?
    The depletion region widens and current flow is minimal
    The diode stops working
    The depletion region narrows and current flow is maximum
    The diode conducts current in both directions
    30s
  • Q8
    What is the main function of the PN junction in a diode?
    Amplifying the signal
    Allowing current to flow in one direction and blocking it in the other
    Regulating voltage levels
    Generating electrical power
    30s

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