"Electric Current and Power"

1. The problem with a high current is that you _____ loads of energy through heat in cables (4)
3. A unit for measuring the strength of the flow of electricity (3)
4. The amount of energy an appliance uses depends on its _____ and time you leave it on for. The _____ of an appliance can be worked out using this equation: _____ (in W) = Energy (in J) ÷ Time (in s) (5)
5. _____ is the rate of flow of charge around a circuit (7)
9. A light bulb turns electrical energy into light (and _____ energy) (4)
10. A unit for measuring electrical power, measured in joules per second (4)

2. _____ current is a flow of charge round a circuit (8)
3. Dark matt surfaces _____ heat radiation falling on them better than bright glossy surfaces, such as gloss white or silver. They also emit much more heat radiation (at any given temperature). (6)
7. ______ usually carry the charge - they're negatively charged particles (9)
8. Transformers all have _____ coils, the primary and the secondary, joined with an iron core (3)

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