Magnitude of a Vector How do you find the magnitude of a vector? The magnitude of a vector tells us its size or length For a displacement vector it tells us the distance between the two points For ...
GCSE考试很难吗？本期我们来看看英国TS网站提到的2021年最难的5道GCSE数学真题解析！TS表示虽然他们已经尽量在学生中调查最难的GCSE数学题了，但是每个人在GCSE数学上的优点和缺点的都不同，所以不存在真正意义上...
Capacitance Capacitors are electrical devices used to store energy in electronic circuits, commonly for a backup release of energy if the power fails They are in the form of two conductive m...
Adding & Subtracting Vectors How are vectors added and subtracted numerically? To add or subtract vectors numerically simply add or subtract each of the corresponding components In column vecto...
Work Done on a Charge When a mass with charge moves through an electric field, work is done The work done in moving a charge q is given by: ∆W = q∆V Where: ∆W = change in work done (J) q = c...
Graphical Representation of Electric Potential Electric field strength, E and the electric potential, V can be graphically represented against the distance from the centre of a charge, r E, ...
Electric Potential In order to move a positive charge closer to another positive charge, work must be done to overcome the force of repulsion between them Similarly, to move a positive charg...
Scalars & Vectors What are scalars? Scalars are quantities without direction They have only a size (magnitude) For example: speed, distance, time, mass Most scalar quantities can never be negat...
Electric Potential In order to move a positive charge closer to another positive charge, work must be done to overcome the force of repulsion between them Similarly, to move a positive charg...
