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Ответ:

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!