MDCAT Physics MCQ #1239

MDCAT Physics MCQ #1239

1. Question 1

   Q1. The forbidden energy gap in a semiconductor is

   • A) the energy required to break a covalent bond
   • B) the energy required to move an electron from valence to conduction band
   • C) the energy released when an electron falls from conduction to valence band
   • D) the energy required to remove an electron from a metal surface

   Answer: the energy required to move an electron from valence to conduction band

   Explanation: Forbidden energy gap is the energy difference between valence and conduction bands.