In an n-type silicon, which of the following statement is true:
1. | Electrons are majority carriers and trivalent atoms are the dopants. |
2. | Electrons are minority carriers and pentavalent atoms are the dopants. |
3. | Holes are minority carriers and pentavalent atoms are the dopants. |
4. | Holes are majority carriers and trivalent atoms are the dopants. |
In an unbiased p-n junction, holes diffuse from the p-region to n-region because :
1. | free electrons in the n-region attract them. |
2. | they move across the junction by the potential difference. |
3. | hole concentration in p-region is more as compared to n-region. |
4. | All the above. |