Zener Diodes and Temperature Coefficient Quiz
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Questions and Answers

What type of diode converts an electrical signal into coherent light?

  • Tunnel Diode
  • Laser Diode (correct)
  • PIN Diode
  • Schottky Diode
  • Which diode is used as a voltage-controlled resistor in microwave applications?

  • Tunnel Diode
  • Laser Diode
  • PIN Diode (correct)
  • Schottky Diode
  • What type of diode exhibits a negative resistance region between points B and C on its characteristic curve?

  • Schottky Diode
  • Tunnel Diode (correct)
  • PIN Diode
  • Laser Diode
  • Which diode has a metal-to-semiconductor contact and is used primarily in high-frequency applications?

    <p>Schottky Diode</p> Signup and view all the answers

    Which diode has the most common use as lasers?

    <p>Laser Diode</p> Signup and view all the answers

    Which diode has a low forward voltage drop and high efficiency but a low reverse voltage rating?

    <p>Schottky Diode</p> Signup and view all the answers

    What determines whether the temperature coefficient of a zener diode is positive or negative?

    <p>Zener voltage</p> Signup and view all the answers

    In what region of operation is a zener diode designed to function?

    <p>Reverse breakdown</p> Signup and view all the answers

    What is the primary application of a zener diode due to its constant breakdown voltage?

    <p>Voltage regulation</p> Signup and view all the answers

    What is the zener impedance, ZZ, defined as for a zener diode?

    <p>Ratio of change in voltage to change in current</p> Signup and view all the answers

    What is the primary role of zeners in three-terminal regulators?

    <p>Establishing a reference voltage</p> Signup and view all the answers

    What is the main purpose of using back-to-back zeners in a circuit?

    <p>Limiting the output to a specific voltage</p> Signup and view all the answers

    Which type of diode is designed for limiting the voltage across its terminals in reverse bias?

    <p>Zener diode</p> Signup and view all the answers

    What is the process of releasing light energy by the recombination of electrons in a semiconductor called?

    <p>Electroluminescence</p> Signup and view all the answers

    Which diode emits light when there is a forward current?

    <p>Light-emitting diode</p> Signup and view all the answers

    What is the basic unit for producing colored light in an LED display screen?

    <p>Pixel</p> Signup and view all the answers

    In which region of the characteristic curve does a Current Regulator Diode maintain a constant current?

    <p>Horizontal portion region</p> Signup and view all the answers

    What type of diode has a single pn junction and conducts current in one direction only?

    <p>Diode</p> Signup and view all the answers

    What are the majority carriers in n-type materials?

    <p>Electrons</p> Signup and view all the answers

    Which region of the diode is characterized by a dramatic increase in reverse current?

    <p>Zener region</p> Signup and view all the answers

    What is the maximum reverse voltage that prevents a diode from entering the Zener region called?

    <p>Peak inverse voltage</p> Signup and view all the answers

    In which bias condition does a diode change from no-bias to forward-bias?

    <p>Forward bias</p> Signup and view all the answers

    Which material has an approximate forward bias voltage of 0.7 V?

    <p>Silicon diode</p> Signup and view all the answers

    How does temperature affect the required forward bias voltage for conduction?

    <p>Reduces the required voltage</p> Signup and view all the answers

    What is the primary difference between conductors and insulators?

    <p>Number of free electrons available for conduction</p> Signup and view all the answers

    Why is intrinsic silicon a poor conductor?

    <p>Tightly bound electrons in the crystal</p> Signup and view all the answers

    What happens when a few electrons jump into the conduction band in intrinsic silicon?

    <p>Creation of a positive charge</p> Signup and view all the answers

    How does Antimony change the conductivity of silicon?

    <p>Adds free electrons to the material</p> Signup and view all the answers

    Between conductors, insulators, and semiconductors, where do semiconductors fall in terms of conductivity?

    <p>In the middle range of conductivity</p> Signup and view all the answers

    Why are holes in intrinsic silicon considered to have mobility?

    <p>They move between atoms creating charge movement</p> Signup and view all the answers

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