In a p-type semiconductor, a hole is A) an extra proton ...

[cookcarl]

In a p-type semiconductor, a hole is
 
  A) an extra proton supplied by a donor atom.
  B) an extra electron supplied by a donor atom.
  C) a donor atom.
  D) a region where an electron is missing.
  E) a missing atom in the crystalline structure.

Question 2

A window glass that is 0.5 cm thick has dimensions of 3 m by 1.5 m. The thermal conductivity of this glass is 0.8 W/m  K.
 
  If the outside surface of the glass is at -10C and the inside surface is at 20C, how much heat flows through the window in every hour?
  A) 50 MJ
  B) 60 MJ
  C) 70 MJ
  D) 80 MJ

[ilianabrrr]

Answer to Question 1

D

Answer to Question 2

D