Electric Fields An?electric field?is a region of space in which an electric charge “feels” a force It is a vector field The direction of the electric field is the same as the direction of the elect...
Potential Difference Potential difference is a measure of the electrical potential energy transferred from an electron as it moves between two points in a conductor Potential difference is work don...
Drift Speed In conductors, only negatively charged (delocalised) electrons are allowed to move between atoms In general, an electric current can arise from the flow of either positive or negative p...
Charge Charge is measured in?coulombs?(C). One coulomb is defined as: The charge carried by an electric current of one ampere in one second Charge is a?scalar?quantity Electrons?have a?negative cha...
Harmonics Stationary waves can have different wave patterns, known as?harmonics These depend on the?frequency?of the vibration and the?boundary conditions?(i.e. fixed and/or free ends) The harmonic...
Boundary Conditions Stationary waves can form on strings or in pipes In both cases, progressive waves travel in a medium (i.e. the string or air) and superimpose with their reflections The number o...
Nodes & Antinodes A standing wave is made up?nodes?and?antinodes Nodes?are locations of?zero amplitude?and they are?separated by half a wavelength?(λ/2) Antinodes?are locations of?maximum ampli...
The Nature of Standing Waves Standing waves?are produced by the?amplitude?travelling in?opposite directions This is usually achieved when a travelling wave superimposes its reflection The superposi...
Double-Slit Equation Interference Patterns Interference patterns depend on: The?coherent?light incident on the slits The?distance between the slits and the screen?where the interference pattern is ...
