Diodes and their applications

Explanation of question 2

Good examples of semiconductor material are

  1. arsenic and silicon
  2. germanium and aluminium
  3. arsenic and aluminium
  4. germanium and silicon

The answer is :- 4 Germanium and silicon are the two commonest semiconductor materials. Arsenic and aluminium are impurities added to form n-type and p-type materials respectively.

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