Ntype extrinsic semiconductors attribute their conductive to
     N-type extrinsic semiconductors attribute their conductive to properties mainly due to which charge carriers?  electrons and holes  holes  electrons  protons  Corrosion can be prevented or slowed down by choosing a metal that passivates in a particular environment. Passivation involves which of the following?  Increased current from the anodic reaction  Application of a polymer coating to the metal  Formation of a protective oxide on the metal  Adding inhibitors to the electrochemical environment  
  
  Solution
Question 7 ans: holes
Question 8 ans : formation of protective oxide on the metal

