Behaviour of Charged Particles (5.1)

Question 1

What is Net charge

Answer 1

When electrons move from one object to another, both objects are said to have a net charge

Question 2

What is a coulomb

Answer 2

A coulomb is a the SI unit of charge

Question 3

What is a coulomb

Answer 3

A coulomb is the SI unit of charge

Question 4

Proton and electron charge

Answer 4

+ 1.6x10^-19 = proton

• 1.6x10^-19 = electron

Question 5

Why are metals conductors

Answer 5

Metals are conductors as the valence electrons are only slightly attracted to the nucleus

Loose electrons can move freely within the material and can thus conduct electricity

Question 6

Why are non metals insulators

Answer 6

Non metals are insulators as the valence electrons are tightly bound to the their respective nucleus and cannot move freely. This why non metals are insulators

Question 7

What are semi conductors

Answer 7

Materials that have a conductivity value falling in between that of conductors and insulators

Question 8

Explain why electric circuits often consist of wires that are made from copper and are coated in a protective plastic?

Answer 8

Copper is a good conductor of electricity

Plastic is a good insulator

Plastic coating is used to prevent charge leaving the circuit