Mains electricity

Question 1

what is A/C current

Answer 1

alternating current- repeatedly changes direction

Question 2

Is A/C mains or battery?

Answer 2

Mains

Question 3

What are the values for A/C current

Answer 3

freq is 50hz and voltage is 230v

Question 4

what is D/C current

Answer 4

direct current, flows in same direction

Question 5

is d/c current battery or mains

Answer 5

battery

Question 6

what does frequency of current mean?

Answer 6

how many times per second it completes a cycle

Question 7

what is he equation to link frequency and time

Answer 7

f= 1/T

Question 8

what colour is the neutral wire?

tip: neutral ph

Answer 8

blue

Question 9

what colour if the earth wire

tip: what colour is the ground

Answer 9

green

Question 10

what colour is the live wire

tip: what colour is our blood that keeps us aLIVE

Answer 10

brown

Question 11

how much voltage does the neutral wire have?

Answer 11

0V

Question 12

what is the earth wire for?

Answer 12

safety wire

Question 13

how much voltage does the live wire carry?

Answer 13

230V

Question 14

what is a short circuit?

Answer 14

where a very large current rushes between live and neutral wire

Question 15

what safety feature does the fuse have?

Answer 15

contains a thin wire which melts if the current is too large so it breaks the circuit and safely switches the appliance off