Semiconductor Charges and Properties Quiz
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Questions and Answers

What is the charge of a hole in a semiconductor?

  • Variable
  • Neutral
  • Negative
  • Positive (correct)
  • What is the purpose of doping in semiconductors?

  • Reduce conductivity
  • Weaken covalent bonds
  • Enhance core electrons
  • Control electronic properties (correct)
  • What happens to covalent bonds in a semiconductor when thermal energy is applied?

  • Strengthens bonds
  • Transfers bonds
  • Creates more bonds
  • Breaks bonds (correct)
  • What is the notation used for electron density in Semiconductor Physics?

    <p>n (D)</p> Signup and view all the answers

    What is the energy unit typically used to measure thermal energy?

    <p>Kelvins (A)</p> Signup and view all the answers

    What is the condition called when the rate of electron-hole generation equals the rate of recombination in a semiconductor?

    <p>Generation-recombination equilibrium (A)</p> Signup and view all the answers

    What is the constant that represents the mobility of holes in semiconductors?

    <p>Hole mobility (B)</p> Signup and view all the answers

    What happens to the mobility of charge carriers with an increase in doping (n-type or p-type) in semiconductors?

    <p>It decreases (D)</p> Signup and view all the answers

    What is the physical quantity that describes how much current flows when an electric field is applied in a semiconductor?

    <p>Conductivity (D)</p> Signup and view all the answers

    Which equation relates the ratio of resistivity to conductivity in semiconductors?

    <p>Einstein's Relation (A)</p> Signup and view all the answers

    What is the mechanism by which current flows in semiconductors due to non-uniform carrier densities?

    <p>Diffusion (A)</p> Signup and view all the answers

    What are the two material constants related to carrier transport as introduced by Einstein?

    <p>Mobility and diffusivity (C)</p> Signup and view all the answers

    In a P-doped semiconductor, what is the correct relationship between the doping density and Φ?

    <p>Φ is directly proportional to the doping density (C)</p> Signup and view all the answers

    In a semiconductor, what is the correct statement about the generation of electrons and holes by photons?

    <p>Electrons and holes are generated in pairs by photons (D)</p> Signup and view all the answers

    What is the correct equation that describes the behavior of electrons and holes in semiconductors?

    <p>Rate = G + R (C)</p> Signup and view all the answers

    In a P-doped semiconductor, what is the correct statement about the role of electrons?

    <p>Electrons are the minority carriers (A)</p> Signup and view all the answers

    When turning off light in a semiconductor where electrons and holes were previously generated, how does thermal equilibrium get restored?

    <p>Excess carriers decay exponentially (B)</p> Signup and view all the answers

    What is the correct statement about the solution for excess minority carriers in semiconductor recombination?

    <p>It decays exponentially to zero (D)</p> Signup and view all the answers

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