Semiconductor Electronics

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Question 1

Which of the following materials is typically used as a semiconductor?

  • Copper

  • Silicon

  • Aluminum

  • Gold

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Question 2

In an intrinsic semiconductor, what is the relationship between the number of free electrons and holes?

  • The number of free electrons is less than the number of holes

  • The number of free electrons is equal to the number of holes

  • The number of holes is greater than the number of free electrons

  • There are no free electrons or holes in intrinsic semiconductors

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Question 3

Which type of doping creates an n-type semiconductor?

  • Doping with group III elements.

  • Doping with group IV elements

  • Doping with group V elements

  • Doping with group II elements

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Question 4

What happens when a forward bias is applied to a PN junction diode?

  • The diode conducts current easily

  • The diode blocks current completely

  • The diode becomes non-conductive

  • The diode emits light

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Question 5

What is the main use of a Zener diode?

  • To act as a rectifier

  • To regulate voltage in reverse bias

  • To amplify signals

  • To emit light

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Question 6

What is the typical forward voltage drop across a silicon diode when conducting?

  • 0.1 V

  • 0.3 V

  • 0.7 V

  • 1.5 V

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Question 7

Which region of a Bipolar Junction Transistor (BJT) is the most important for amplification?

  • Emitter-Base junction

  • Collector-Base junction

  • Base-Collector junction

  • Emitter-Collector junction

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Question 8

In an n-type semiconductor, which of the following is the majority carrier?

  • Electrons

  • Holes

  • Protons

  • Neutrons

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Question 9

What is the primary application of a photodiode?

  • Voltage regulation

  • Light emission

  • Light detection

  • Signal amplification

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Question 10

Which of the following statements is true for a PN junction diode when it is in reverse bias?

  • The current increases rapidly as the applied voltage increases.

  • No current flows through the diode, regardless of the applied voltage

  • A small leakage current flows, and the diode is prone to breakdown if the reverse voltage exceeds a certain value.

  • The diode behaves like a conductor and allows current to pass freely.

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Physics

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