Edexcel A Level Physics:复习笔记3.3 Ohm's Law
Defining Resistance Resistance Resistance is defined as the opposition to current It is further defined by Ohm's Law, which says that the resistance of a conductor is given by the ratio of p...
Edexcel A Level Physics:复习笔记3.2 Potential Difference
Potential Difference Potential Difference A cell makes one end of the circuit positive and the other negative This sets up a potential difference across the circuit This is sometimes known as the v...
Edexcel A Level Physics:复习笔记3.1 Electric Current
Electric Current Electric Current Electric current is defined as: The rate of flow of charge It is measured in units of amperes (A) or amps The charge, current and time are related by the equation:...
UCL 2023入学ALevel、IB成绩要求！
英国名校众多，其中G5大学代表了英国最高研究和学术水平，因此，G5大学对申请者的成绩要求都是“没有最高只有更高”。今天就一起来看看UCL 2023入学ALevel、IB成绩要求！ UCL A-Level标准入学要求 是A*A*A-ABB。当...
2022年最不受欢迎的10大A-level科目排名！
A-Level（General Certificate of Education Advanced Level ），英国高中课程，是英国全民课程体系，是英国普通中等教育证书考试高级水平课程，也是英国学生的大学入学考试课程。 A-Level科目的受欢迎度在一定程...
A-Level最受欢迎科目排名！
A-Level（General Certificate of Education Advanced Level ），英国高中课程，是英国全民课程体系，是英国普通中等教育证书考试高级水平课程，也是英国学生的大学入学考试课程。 A-Level科目的受欢迎度在一定程...
Edexcel A Level Physics:复习笔记2.22 Efficiency
Efficiency The efficiency of a system is a measure of how well energy is transferred in a system Efficiency is defined as: The ratio of the useful power or energy transfer output from a syst...
Edexcel A Level Physics:复习笔记2.21 Power
Power The power of a mechanical process is the rate at which energy is transferred Since work done is equal to the energy transferred, power can also be defined as the rate of doing work or the wor...
Edexcel A Level Physics:复习笔记2.20 The Principle of Conservation of Energy
The Principle of Conservation of Energy The principle of conservation of energy is a law of Physics which always applies to a closed system To apply conservation of energy, heat losses are usually ...
