electricity - alternating current

Question 1

what does DC stand for?

Answer 1

direct current

Question 2

in a direct circuit what is the current like?

Answer 2

in a direct circuit the current flows in one direction only, directly from positive to negative

Question 3

what produces dc?

Answer 3

batteries and power packs

Question 4

what does AC stand for?

Answer 4

alternating current

Question 5

in an alternating circuit what is the current like?

Answer 5

in an AC circuit the current is continually changing direction or alternating

Question 6

what produces ac?

Answer 6

mains electricity

Question 7

what can you use to look at ac and dc sources?

Answer 7

an oscilloscope

Question 8

on an ac trace what happens to the potential?

Answer 8

the potential varies constinuously from positive potential to negative potential

Question 9

what is the main electricity in the UK?

Answer 9

230v ac at 50hz

this means it supplies the equivalent of 230v dc and it changed direction 50 times

Question 10

what is amplitude?

Answer 10

the measure from the middle point to the crest