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True or false: intrinsic semiconductors

Exercise and reference answers

Questions
  1. Statement is true
    Yes
    Statement
    Pure semiconductors are called intrinsic semiconductors.
  2. Statement is true
    Yes
    Statement
    Their charge carriers are electrons and holes.
  3. Statement is true
    Yes
    Statement
    Those carriers arise from thermal excitation.
  4. Statement is true
    No
    Statement
    A pure semiconductor has no charge carriers at all.
  5. Statement is true
    Yes
    Statement
    The presence of these carriers is an intrinsic property.

Explanation

A pure semiconductor still has carriers, from thermal excitation. Source: syllabus Physics, Ch 14 Semiconductor Electronics.
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