Multiple choice

N-type semi-conductors are obained by adding impurities to pure germanium. The impurities have to be

  1. monovalent

  2. trivalent

  3. tetravalent

  4. pentavalent
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

N-type semiconductors are created by doping pure semiconductor materials like germanium or silicon with pentavalent impurities (elements with 5 valence electrons like phosphorus, arsenic, or antimony). These impurities donate extra electrons for conduction, hence 'n' for negative charge carriers.

Keep practicing — related questions