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ACDC

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Across
1.Direct current that makes your hair stick up if you remove your sweater.
8.Component that changes DC into AC
10.Component that changes AC into DC
12.Component used to measure current.
13.Type of substance that has many free electrons that are able to move.
15.The electrons flow forwards, then backwards, then forwards, then backwards etc.....
16.Current is measured in __________________
17.The number of times a second that mains electricity in Europe changes direction.
Down
2.Current direction is STATED AS from positive to negative (electrons flow in the other direction!)
3.The flow of electrons in a circuit
4.Type of current in batteries/cells and devices that contain a battery e.g: cell phone
5.Mains electricity is this type of current.
6.The electrons flow in one direction only
7.The number of times that alternating current changes direction per second is measured in ______________
9.The type of current needed in small electrical appliances
11.A device that can change the voltage and is only used with alternating current.
14.Direct current with an extremely high voltage
16.The type of current needed in large appliances

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