Semiconductor Physics and Diodes MCQs

Question 1

A strong electric field across a P-N junction that causes covalent bonds to break apart

Accepted Answer

It is called Level breakdown

Answer

It is called avalance breakdown

Answer

It is called reverse breakdown

Answer

It is called Low voltage breakdown

Question 2

When a PN-junction is reverse biased

Accepted Answer

holes and electrons move away from the junction

Answer

holes and electrons move towards the junction

Answer

movement of holes and electrons seized

Answer

depletion region decreases

Question 3

The total energy of a revolving electron in an atom can

Accepted Answer

never be positive

Answer

have any value above zero

Answer

never be negative

Answer

not be calculated

Question 4

An atom is said to be ionised when any one of its orbiting electron

Accepted Answer

is completely removed

Answer

Jumps from one orbit to another

Answer

is raised to a higher orbit

Answer

comes to the ground state

Question 5

The maximum nmber of electrons which the M-shell of an atom can contain is

Accepted Answer

18

Answer

32

Answer

8

Answer

50

Question 6

Electronic distribution glf an Si atom is

Accepted Answer

2, 8, 4

Answer

2, 10, 2

Answer

2, 7, 5

Answer

2, 4, 8

Question 7

Semiconductor materials have bands.

Accepted Answer

covalent

Answer

ionic

Answer

mutual

Answer

metallic

Question 8

Silicon has Z = 14. It outermost orbit is

Accepted Answer

half filled

Answer

partially filled

Answer

completely occupied

Answer

empty

Question 9

Major part of the current in an intrinsic semiconductor is due to

Accepted Answer

conduction-band electrons

Answer

valence-band electrons

Answer

holes in the valence band

Answer

thermally-generated electron