第 1 題
1 分Inside a standard UK three-core cable, what is the color of the insulation covering the neutral wire?
AQA GCSE · Physics 8463
家庭用電與安全：練習題
5 條多項選擇題即時批改，另有 2 條文字題附完整解題步驟，全部圍繞「家庭用電與安全」。
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第 2 題
1 分What are the typical values for the frequency and potential difference of the UK domestic mains electricity supply?
第 3 題
1 分An electric heater with a resistance of \(46\text{ }\Omega\) is connected to the UK mains supply (\(230\text{ V}\)). Calculate the power of the heater.
第 4 題
1 分A toaster is connected to the UK mains supply. What is the approximate potential difference between the live wire and the earth wire?
第 5 題
1 分A microwave oven uses the UK mains supply (\(230\text{ V}\)). If the current through the device is \(4\text{ A}\), calculate the power of the microwave.
第 6 題
2 分State the insulation color for the live, neutral, and earth wires used in a standard UK three-core cable.
先自己寫一次答案，再對照解題步驟。
第 7 題
6 分Explain how the earth wire and a fuse work together to protect a user if a fault causes the metal case of an appliance to become live.
先自己寫一次答案，再對照解題步驟。
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