Diodes and their applications

Explanation of question 3

• i = n-type material has a lattice structure having a surplus electron,
• ii = p-type material has a lattice structure having a surplus electron

1. i and ii are both true
   
2. i is true, but ii is false
   
3. i is false, but ii is true
   
4. i and ii are both false

The answer is :- 2  i is true; ii is false.