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- 1. Multiple-choice45 seconds1 ptThe frequency of mains electricity in the uk is ___hz (cycles per second)50windspecificBrakingresolving
- 2. Multiple-choice45 seconds1 ptMains electricity uses _______________(name) current.alternatingwavesolidConservedvoltage
- 3. Multiple-choice45 seconds1 ptU.K. Mains = _________V230unreliableradiationDirectly proportionalUse the formula to work out the current for a microwave with a 230V@ 690W rating. ______ A (do not include the unit).
- 4. Multiple-choice45 seconds1 ptA battery supplies _______________ current to an appliance.DirecttidalPowerElasticup
- 5. Multiple-choice45 seconds1 ptThe fuse _______________ when there is too much current flowing through the circuit.meltsstartMetalsExtensiontransformers
- 6. Multiple-choice45 seconds1 ptWhat colour is the live wire?BrownsolarmassInertiaPower
- 7. Multiple-choice45 seconds1 ptWhat colour is the neutral wire?Blueshortestloft insulationproportionalityplastic
- 8. Multiple-choice45 seconds1 ptThe ____________ wire is green and yellowearthrenewableliquidMassnational grid
- 9. Multiple-choice45 seconds1 pt
All appliances with a __________ case need a 3 core cable containing live@ neutral and earth wires.
metal
nuclear
Joules
Momentum
glass
- 10. Multiple-choice45 seconds1 ptThe pins on a plug are made out of _____________ because it is a good conductor and it doesn't rust or oxidiseBrassnonmaintenanceStoppingmelts
- 11. Multiple-choice45 seconds1 ptA ____________________ case stops someone from getting an electric shock when they touch the appliance (even if the live wire touches the case). These appliances do not need an earth wire and often use a 2 core cable.plasticneutralhydroelectricTerminal velocityheats
- 12. Multiple-choice45 seconds1 ptA giant system of cables and transformers distributes electricity around the country. This is called the ______________ ____________.national gridnaturalgridThinkingFrequency
- 13. Multiple-choice45 seconds1 ptA step __________ transformer reduces the potential difference (for safety) which increases the current.downmaintenancegasWeightearth
- 14. Multiple-choice45 seconds1 ptWe use ________________________(plural) to reduces energy losses (as heat) during transmission. Higher currents transfer more energy as heat along the cable.transformershydroelectricevaporationresultantdown
- 15. Multiple-choice45 seconds1 ptA step _______ transformer Increases the potential difference which decreases the current ( lower current less energy wasted).upgridEmittingaccelerationDirect
- 16. Multiple-choice45 seconds1 ptWall sockets are connected in parallel. This is because each branch in a parallel circuit will have the same _______________.voltagegeothermaldifferenceN/kgBrown
- 17. Multiple-choice45 seconds1 ptWhen current flows through a resistor it ________up.heatsExample: biomass, geothermal, hydropower, solar, windconductormaintenancealternating
- 18. Multiple-choice45 seconds1 pt________________________ = current x potential differencePowerelectricalconductionhydroelectric60W
- 19. Multiple-choice45 seconds1 ptCalculate the power for a 12V@ 5A light bulb.60Wcrudeconductiongrid5A
- 20. Multiple-choice45 seconds1 ptWhich fuse would you use for an electric mixer which uses a current of 4A.5A3Agridgrid50
