physics P2

Question 1

what happens to resistance in a series circuit?

Answer 1

resistance adds up- because by adding one in series, the two have to share potential difference

Question 2

how is electricity distributed?

Answer 2

the national grid

Question 3

why are power cables at high voltage?

Answer 3

keeps current low which reduces energy loss

Question 4

how is voltage increased?

Answer 4

by a step up transformer

Question 5

what is a step down transformer?

Answer 5

a transformer to reduce the volatge from primary to secondary (high to low)

Question 6

where are step up transformers used?
why are they used?

Answer 6

distribution substation and local poles
to reduce voltage and make homes safer

Question 7

what component is always connected in parallel in a circuit?

Answer 7

voltmeter

Question 8

what is an LDR?

Answer 8

light dependent resistor