Domestic uses of electricity

Question 1

what are the features of a direct current supply

Answer 1

it has a potential difference that is always positive or always negative-the currnt direction is constant

it is the type of current that is supplied by cells and batteries

Question 2

what are the features of an alternating current

Answer 2

• has a potential diff. that alternates from positive to negative-the current direction alternates
• is the type of current used in mains electricity

Question 3

how many volts is the mains electricity in the uk

Answer 3

230V