Magnetic Flux, Flux Density & Flux Linkage Magnetic Flux Density The strength of a magnetic field is defined by the density of the magnetic field lines, or magnetic flux density, at that point ...
Exponential Discharge in a Capacitor The Discharge Equation When a capacitor discharges through a resistor, the charge stored on it decreases exponentially The amount of charge remaining on the cap...
Required Practical: Charging & Discharging Capacitors Aim of the Experiment The overall aim of this experiment is to calculate the capacitance of a capacitor. This is just one example of how th...
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...
