AQA A Level Physics复习笔记6.1.2 Radians
Radians In circular motion, it is more convenient to measure angular displacement in units of radians rather than units of degrees The angular displacement (θ) of a body in circular motion i...
AQA A Level Physics复习笔记6.1.1 Circular Motion
Circular Motion Velocity and acceleration are both vector quantities An object in uniform circular motion has a constant linear speed However, it is continuously changing direction. Since ve...
AQA A Level Physics复习笔记5.4.2 Required Practical: Investigating EMF & Internal Resistance
Required Practical: Investigating EMF & Internal Resistance Aims of the Experiment The overall aim of the experiment is to investigate the relationship between e.m.f and internal resista...
AQA A Level Physics复习笔记5.4.1 Electromotive Force & Internal Resistance
Electromotive Force When charge passes through a power supply such as a battery, it gains electrical energy The electromotive force (e.m.f) is defined as: The amount of chemical energy conve...
AQA A Level Physics复习笔记5.3.4 Potential Divider Circuits
Potential Divider Circuit When two resistors are connected in series, through Kirchhoff’s Second Law, the potential difference across the power source is divided between them Potential divid...
AQA A Level Physics复习笔记5.3.3 Electrical Energy & Power
Energy & Power In mechanics, power P is defined as the rate of doing work The potential difference is the work done per unit charge Current is the rate of flow of charge Therefore...
AQA A Level Physics复习笔记5.3.2 Series & Parallel Circuits
Series & Parallel Circuits Current In a series circuit, the current is the same for all components In a parallel circuit, the current is split across the different branches (or junction)...
AQA A Level Physics复习笔记5.3.1 Resistors in Series & Parallel
Resistors in Series & Parallel Resistors in Series When two or more components are connected in series: The combined resistance of the components is equal to the sum of individual resist...
AQA A Level Physics复习笔记5.2.4 Required Practical: Investigating Resistivity
Required Practical: Investigating Resistivity Aims of the Experiment The aim of the experiment is to determine the resistivity of a 2 metre constantan wire Variables: Independent variable = ...
