第 1 题
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：练习题
5 道选择题即时批改，另有 2 道文字题附完整解题步骤，全部围绕「家庭用電與安全」。
7 道题目13 分免费，无需注册
第 2 题
1 分What are the typical values for the frequency and potential difference of the UK domestic mains electricity supply?
第 3 题
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 题
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 题
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 题
2 分State the insulation color for the live, neutral, and earth wires used in a standard UK three-core cable.
先自己写一遍答案，再对照解题步骤。
第 7 题
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.
先自己写一遍答案，再对照解题步骤。
* thinka提供的内容由AI生成，可能并非总是准确或最新。请将其用作辅助资源，并与官方材料进行核实。
想多做几道同类题目？立即开始练习这个课题，边做边批改。
立即练习