Inefficiencies in a Transformer Inefficiencies in a transformer appear not from just the core, but also in the wires The coils of wire have resistance This causes heat energy to be lost from...
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...
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 ...
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...
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 ...
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...
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 Ionic Bonds: Dot & Cross Diagrams Deducing Dot & Cross Diagrams for Ionic Compounds Sodium is a group 1 metal so...
Edexcel IGCSE Chemistry 复习笔记 1.6.3 Formulae for Ionic Compounds Formulae for Ionic Compounds The formulae of simple ionic compounds can be calculated if you know the charge on the ions B...
