Across
- 3. Electric current in a circuit that is in one direction.
- 4. It is used to connect the mains plug of a mains appliance to the mains circuit.
- 6. Electric current in a circuit that repeatedly reverses its direction.
- 10. Two or three insulated wires surrounded by an outer layer of rubber or flexible plastic.
- 11. It has an insulated case and is used to connect the cable from appliance to a socket.
- 12. It contains a thin wire that melts and cuts the current off if too much current passes through it.
Down
- 1. An appliance that has a plastic case and therefore, does not need an earth wire.
- 2. Connected to the ground by means of a conducting lead or wire.
- 5. The number of complete cycle an alternating current passes through each second.
- 7. A plug which has a live pin, a neutral pin and an earth pin. The earth pin is used to earth the metal case of an appliance so the case cannot become live.
- 8. An electromagnetic switch the opens and cuts the current off if too much current passes through it.
- 9. Special type of circuit breaker that acts very quickly.