electrostatics

Question 1

when you comb your hair with a plastic comb, some hairs get attracted
what had happened to the comb?

Answer 1

electrons have been transferred by friction
the comb is now charged

Question 2

if a charged comb is held above small pieces of paper, what is likely to happen?

Answer 2

the tissue will be attracted to the comb

Question 3

how can a car become electrically charger whilst driving

Answer 3

electron transfer
due to friction

Question 4

describe a possible danger of fuelling an electrically-charged caf

Answer 4

it can cause a spark, fire or explosion

Question 5

how does connecting a safety wire reduce the rangers whilst refuelling an electrically charged car

Answer 5

charge/current flowing in the wire
no charge is left

Question 6

polythene rod when rubbed with cloth

Answer 6

cloth -> rod
rod = negative
cloth = positive

Question 7

acetate rod when rubbed with cloth

Answer 7

rod -> cloth
rod = positive
cloth = negative

Question 8

how to show there are 2 different charges

Answer 8

hang the rods freely
opposite charges will attract
like charges will repel

Question 9

when a negative balloon is moved next to a neutral wall

Answer 9

the positively charged region will attract to the negative balloon