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Physics

Quiz by Dr. Nitendra Kumar Gautam

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40 questions
Show answers
  • Q1
    What is the primary function of a PN diode?
    To store electrical energy
    To act as a variable resistor
    To amplify electrical signals
    To allow current to flow in one direction only
    30s
  • Q2
    What materials are commonly used to create PN diodes?
    Silicon and Gallium Arsenide
    Copper and Aluminum
    Lead and Zinc
    Iron and Nickel
    30s
  • Q3
    In a PN diode, what do the 'P' and 'N' stand for?
    Power and Neutral
    Positive and Negative
    P-type and N-type
    Primary and Secondary
    30s
  • Q4
    What is the primary function of a Zener diode in a circuit?
    Signal amplification
    Rectification
    Current limiting
    Voltage regulation
    30s
  • Q5
    What is the breakdown voltage of a Zener diode?
    The forward voltage drop
    The total voltage applied across the diode
    The voltage at which it begins to act as a resistor
    The reverse voltage at which it conducts in reverse bias
    30s
  • Q6
    Which property of a Zener diode allows it to maintain a stable output voltage?
    Thermal stability
    Forward conduction
    Reverse resistance
    Zener breakdown
    30s
  • Q7
    What is the primary material used in most solar cells?
    Copper
    Glass
    Aluminium
    Silicon
    30s
  • Q8
    What is the main benefit of using solar energy?
    Expensive to install
    Non-renewable energy source
    Renewable energy source
    Limited energy production
    30s
  • Q9
    Which part of a solar cell absorbs sunlight and generates electric current?
    Photovoltaic layer
    Wire connectors
    Glass cover
    Metal frame
    30s
  • Q10
    What factor primarily affects the efficiency of a solar cell?
    Soil type
    Wind speed
    Temperature
    Water availability
    30s
  • Q11
    What is the process called when solar cells convert sunlight directly into electricity?
    Photovoltaic effect
    Thermal energy
    Nuclear fusion
    Electrolysis
    30s
  • Q12
    What are the three main regions of a bipolar junction transistor (BJT)?
    Emitter, Base, Collector
    Source, Gate, Drain
    Positive, Negative, Neutral
    Anode, Cathode, Gate
    30s
  • Q13
    What function does a transistor primarily serve in electronic circuits?
    Capacitance
    Rectification
    Amplification and switching
    Inductance
    30s
  • Q14
    Which type of transistor uses both p-type and n-type semiconductor materials?
    Darlington Pair
    Bipolar Junction Transistor (BJT)
    Field Effect Transistor (FET)
    Insulated Gate Bipolar Transistor (IGBT)
    30s
  • Q15
    What is the primary role of the base in a bipolar junction transistor (BJT)?
    To amplify voltage
    To provide thermal stability
    To store charge
    To control the flow of current between the emitter and collector
    30s

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