Electronic Devices and Circuits - Engineering

Q1:

Which of the following elements act as donor impurities?
  1. Gold
  2. Phosphorus
  3. Boron
  4. Antimony
  5. Arsenic
  6. Indium
Select the correct answer using the codes given below:

A 1, 2, 3

B 1, 2, 4, 6

C 3, 4, 5, 6

D 2, 4, 5

ANS:D - 2, 4, 5

Phosphorous antimony Arsenic are the right answer.