static electricity

Question 1

what happens when insulating materials rubbed together

Answer 1

become statically electrically charged together

Question 2

why can insulators become electrically charged when rubbed together

Answer 2

1. electrons rubbed from one material to another
2. materials gaining electrons become negatively charged
3. material losing electrons becomes positively charged

Question 3

what happens when 2 electrically charged objects are bought close together

Answer 3

they exert a force on each other

Question 4

what happens when 2 identically charged objects are bought close together

Answer 4

they exert an attractive force on each other and attract

Question 5

example of a non-contact force

Answer 5

repulsive or attractive force acting between 2 electrically charged objects

Question 6

what is an electric field

Answer 6

a region in which a charged object will experience a non-contact electrical force

Question 7

where can electric fields be found

Answer 7

surrounding any charged object

Question 8

describe the electric field around a charged particle

Answer 8

1. strongest closest to the object
2. decreases in strength as you move away from the object

Question 9

what happens to the force between 2 charged objects when they are moved closer togteher

Answer 9

the force between them becomes stronger as the separation reduces

Question 10

in situations where sparks are unwanted what precaution must be taken to prevent the build up of static charge

Answer 10

any surfaces rubbing against each other should be earthed to allow the charge to flow off the materials