AQA A Level Physics复习笔记7.10.4 Transformer Efficiency
Transformer Efficiency In reality, transformers are not 100% energy efficient This means their power output is less than the power input For an ideal (100% efficient) transformer, the...
AQA A Level Physics复习笔记7.10.3 The Operation of a Transformer
The Transformer Equation A transformer is A device that changes high alternating voltage at low current to low alternating voltage at high current, and vice versa This is designed to reduce ...
AQA A Level Physics复习笔记7.10.2 The Operation of an Oscilloscope
Oscilloscope as a DC & AC Voltmeter A Cathode-Ray Oscilloscope (CRO) is a laboratory instrument used to display, measure and analyse waveforms of electrical circuits It can therefore be used as...
AQA A Level Physics复习笔记7.10.1 Alternating Current & Voltage
Sinusoidal & Root-Mean-Square Current & Voltage An alternating current (a.c) is defined as: A current which periodically varies between a positive to a negative value with time This ...
IB DP Maths: AA HL复习笔记4.6.1 The Normal Distribution
What is a continuous random variable? A continuous random variable (often abbreviated to CRV) is a random variable that can take any value within a range of infinite values Continuous random variab...
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随着美国疫情的常态化，有些院校不光恢复了线下教学，还涨了学费。相信大家前段时间都听说了：美国顶尖大学的学费又涨了！ 据悉，美国排名前30的大学中有27所正在提高下一学年的学杂费。而自2019-2020学年以来，...
Edexcel IGCSE Chemistry 复习笔记 1.6 5 Ionic compounds: Bonds, Structure & Properties
Edexcel IGCSE Chemistry 复习笔记 1.6 5 Ionic compounds: Bonds, Structure & Properties Ionic bonding The positive and negative charges are held together by the strong electrostatic forces...
Edexcel IGCSE Chemistry 复习笔记 1.6 4 Ionic Bonds: Dot & Cross Diagrams
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AQA A Level Physics复习笔记7.9.6 Required Practical: Investigating Flux Linkage on a Search Coil
Required Practical: Investigating Flux Linkage on a Search Coil Aims of the Experiment The overall aim of this experiment is to determine how the magnetic flux linkage varies with the angle ...
Edexcel IGCSE Chemistry 复习笔记 1.6.2 Common Ions
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AQA A Level Physics复习笔记7.9.5 Applications of EM Induction
Moving Conductors in a Magnetic Field Similar to a coil or a solenoid, a straight conducting rod moving through a magnetic field will also have an e.m.f induced in it This is only when the c...
