1. 6 Mains Electricity Alternating current

2. 6.1 Alternating Current Direct current (d.c.) involves the flow of electrons in one direction normally from batteries. Alternating current (a.c.) involves the rapid change in direction of the current from generators. UK mains electricity is a.c. with a frequency of 50 Hz and voltage of 230V. 9 March, 2016

3. Alternating (changing) current Current a.c. changes sign constantly d.c. always the same sign Frequency = 1  Time for 1 wave. Frequency = 1  0.02 seconds (s) Frequency = 50 Hertz (Hz) + - P185 Summary Questions

4. 6.1 Alternating Current Direct current (d.c.) involves the flow of electrons in one direction normally from batteries. Alternating current (a.c.) involves the rapid change in direction of the current from generators. UK mains electricity is a.c. with a frequency of 50 Hz and voltage of 230V. 9 March, 2016