Properties of Solids: Electrical Properties - Applications of n-type and p-type Semiconductors

Which of the following oxides behaves as conductor or insulator depending upon temperature?

Which transition metal oxide has appearance and conductivity like that of copper?

To get a n-type semiconductor from silicon, it should be doped with a substance with valence ______.

A group of 14 elements is converted into n-type semiconductor by doping it with:

Under the influence of electric field, which of the following statements is true about the movement of electrons and holes in a p-type semiconductor?

(i) Electron will move towards the positvely charged plate through electron holes.

(ii) Holes will appear to be moving towards the negatively charged plate.

(iii) Both electrons and holes appear to move towards the positively charged plate.

(iv) Movement of electrons is not related to the movement of holes.

To prepare n-type semiconductor the impurity to be added to silicon should have the following number of valence electrons:

(a) 2

(b) 3

(c) 4

(d) 5

Which of the following is true about the charge acquired by p-type semiconductors?

Explain why does conductivity of germanium crystals increase on doping with galium.