Charge & Discharge Curves Charging Curves Capacitors are charged by a power supply (e.g. a battery) When charging, electrons are 'pulled' from the plate connected to the positive terminal of th...
Energy Stored by a Capacitor When charging a capacitor, the power supply 'pushes' electrons to one of the metal plates It therefore does work on the electrons and electrical energy becomes stored o...
Capacitance Capacitors are electrical devices used to store energy in electronic circuits, commonly for a backup release of energy if the power fails Capacitors do this by storing electric charge, ...
转眼开学已有一个多月，国内各省市陆续发布新学期阶段学习/考试等政策，和体制内一样，英国教育部也在“黄金九十月”发布GCSE最新政策。 9月下旬，英国教育部(Department of Education)和考试监管机构Ofqual(The Of...
Using Field Lines & Equipotential Diagrams The direction of electric fields is represented by electric field lines Electric field lines are directed from positive to negative Therefore, the fie...
Electric Potential for a Radial Field Electric Potential Energy In order to move a positive charge closer to another positive charge, work must be done to overcome the force of repulsion between th...
Electric Field between Parallel Plates The magnitude of the electric field strength in a uniform field between two charged parallel plates is defined as: Where: E = electric field strength (...
Electric Field & Potential A positive test charge has electric potential energy due to its position in an electric field The amount of electric potential energy depends on: The magnitude of cha...
Electric Field due to a Point Charge The electric field strength describes how strong or weak an electric field is at that point A point charge produces a radial field A charge sphere also acts lik...
