Edexcel A Level Physics:复习笔记7.9 Capacitance
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, ...
2023夏季A-Level/GCSE大考计划公布，高分比例将整体下降！
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...
Edexcel A Level Physics:复习笔记7.8 Representing Radial & Uniform Electric Fields
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...
Edexcel A Level Physics:复习笔记7.7 Electric Potential for a Radial Field
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...
Edexcel A Level Physics:复习笔记7.6 Electric Field between Parallel Plates
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 (...
Edexcel A Level Physics:复习笔记7.5 Electric Field & Potential
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...
Edexcel A Level Physics:复习笔记7.4 Electric Field due to a Point Charge
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...
Edexcel A Level Physics:复习笔记7.3 Electric Force between Two Charges
Electric Force between Two Charges All charged particles produce an electric field around them This field exerts a force on any other charged particle within range The electrostatic force be...
Edexcel A Level Physics:复习笔记7.2 Electric Field Strength
Electric Field Strength The electric field strength at a point is defined as: The force per unit charge acting on a positive test charge at that point The electric field strength can be calculated ...
