PN Junction and Electric Field Quiz
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Questions and Answers

What creates the space charge (depletion) region of width W?

  • Diffusion of holes from p-side to n-side.
  • Electric field E established from the fixed +ve ions (N + d ) and -ve ions (N − a). (correct)
  • Migration of electrons from n-side to p-side.
  • Equilibrium potential difference V0 across W.

    • What happens when p-type and n-type are put together?

  • Holes and electrons remain stationary.
  • Holes diffuse from n-side to p-side and electrons from p-side to n-side.
  • Holes and electrons diffuse in the same direction from p-side to n-side.
  • Holes diffuse from p-side to n-side and electrons from n-side to p-side. (correct)

    • What does the electric field E induce across the depletion region?

  • Increase in carrier migration rate.
  • Neutralization of ionized acceptors and donors.
  • Expansion of the depletion region.
  • Drift current to oppose diffusion current. (correct)

    • What creates the space charge (depletion) region of width W when p-type and n-type are put together?

    <p>Migration of carriers (holes and electrons)</p> Signup and view all the answers

    What type of current does the electric field E induce to oppose the diffusion current across the depletion region?

    <p>Drift current</p> Signup and view all the answers

    What establishes an equilibrium potential difference V0 across the width W of the depletion region?

    <p>The electric field E</p> Signup and view all the answers

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