Очень нужно, помогите срочно)

1) Chemical energy stored in the batteries is converted into electrical energy.

2) The amount of work done is measured in joules (J).

3) A constant flow of electricity travels around a circuit.

4) DC moves in one direction.

5) AC supply changes 50 times per second.

6) Do you know the difference between live and neutral conductors?

7) Don't switch off the light. I am working!