Edexcel A Level Physics:復習筆記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大考計劃公布，高分比例將整體下降！
轉眼開學已有一個多月，國內各省市陸續發布新學期階段學習/考試等政策，和體制內一樣，英國教育部也在“黃金九十月”發布GCSE最新政策。 9月下旬，英國教育部(Department of Education)和考試監管機構Ofqual(The Of...
Edexcel A Level Physics:復習筆記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:復習筆記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:復習筆記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:復習筆記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...
2022 AMC10/12競賽倒計時，AMC歷年真題集等你來領！
AMC是美國數學思維活動（American Mathematics Competitions）的簡稱，是一項面向世界中學生的數學思維訓練，目前每年全球有超過6000所學校的30萬名學生參加該活動，是當今世界上最科學、最權威、最具信譽度的數...
Edexcel A Level Physics:復習筆記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:復習筆記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:復習筆記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 ...
Edexcel A Level Physics:復習筆記7.1 Defining an Electric Field
Defining an Electric Field An electric field is defined as a region of space in which a?charged?particle experiences a?force Hence, electric fields are a type of?force field The charged particle co...
Edexcel A Level Physics:復習筆記6.11 Centripetal Force
Centripetal Force ?Centripetal force can be calculated using any of the following equations: Centripetal force is always perpendicular to the direction of travel Where: F?= centripetal force...
