AQA A Level Physics复习笔记6.1.3 Angular Speed
Angular Speed Any object travelling in a uniform circular motion at the same speed travels with a constantly changing velocity This is because it is constantly changing direction, and is the...
Angular Speed Any object travelling in a uniform circular motion at the same speed travels with a constantly changing velocity This is because it is constantly changing direction, and is the...
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...
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...
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...
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...
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...
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...
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)...
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...
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