Semi Conductor Diodes

Question 1

Are semi conductors insulators or conductors

Answer 1

Neither

Question 2

Name a semi conductor

Answer 2

Silicone

Question 3

The resistance of a semi conductor is —- than the resistance of insulators

Answer 3

Lower

Question 4

The resistance of semiconductors is —- that the resistance of conductors

Answer 4

Much higher

Question 5

To make n-type and p-type into semi conductors we must scatter a small number of other atoms. This is called?

Answer 5

Seeding

Question 6

To make p-type silicone you need ?

Answer 6

3 outer electrons and 4 silicone atoms

Question 7

To make n-type silicone you need?

Answer 7

5 outer electrons and four silicone atoms

Question 8

P-type and n-type are both what type of charge?

Answer 8

Neutral

Question 9

Electrons from silicone atoms are what form of bond?

Answer 9

Covalent

Question 10

When a d.c. circuit is connected to n-type silicone the electrons move to what terminal?

Answer 10

Positive

Question 11

The junction in a p-n junction is known as ?

Answer 11

Depletion layer

Question 12

Where do free electrons go to in a p-n junction?

Answer 12

Cross from n to p type to fill holes

Question 13

What is a diode?

Answer 13

A device which allows electron flow in one direction only

Question 14

Give an example of a diode

Answer 14

P-n juntion

Question 15

When can a diode be used

Answer 15

When a.c sources like mains is the supple for electronic equipment or when an electronic circuit need to prevent flow of electrons in a particular direction