ion - A charged atom (3), repel - Same charges _____, opposite charges attract (5), noncontact - The force between two charged objects (10), switch - A _______ enables the current in a circuit to be switched on and off (6), battery - In circuits, a _______ consists of two or more cells (7), ammeter - An _______ is used to measure electric current (7), voltmeter - A _________ is used to measure potential difference, i.e. voltage (9), coulombs - The unit for charge (8), ohms - The unit for resistance (4), parallel - Circuits may be in series or in ________ (8), neutral - Every mains circuit has a live wire and a _______ wire (7), alternating - A current that repeatedly changes direction is known as an ___________ current (a.c.) (11), direct - ______ current (d.c.) flows in one direction only (6), insulator - Sockets and plug cases are made of hard plastic because plastic is a good electrical _________ (9), blue - In a three-pin plug, the soft plastic surrounding the live wire is _____ in colour (4), earth - In a three-pin plug, the _____ wire is connected to the longest pin (5), heart - An organ in the body that can be replaced with an artificial electric version (5), watts - The unit for power (5), time - To calculate charge flow, current is multiplied by ____ (4), efficiency - Under EU law, all new appliances sold must have an __________ rating (10),

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