national grid & charge (in depth)

what is the national grid?

system of cables and transformers linking power stations to consumers around the UK

what do transformers do?

change the potential difference

what do step-up transformers do?

increase the potential diff from the power station to the national grid

what do step-down transformers do?

decrease the potential diff from the national grid to consumers

what is charge?

a property of all matter

do like charges repel?

yes

do like charges attract?

no

do opposite charges attract?

yes

do insulators conduct electricity?

no

do conductors conduct electricity?

yes