- Andy Darvill Electricity Bills
- Andy Darvill Resistance Calculations
- Andy Darvill Transformer Questions
- BBC GCSE Bitesize Electricity
- Buster Online Tests
Capacitor charge discharge
Charging and dischasrging graphs for a capacitor circuit.
Switch on the circuit and watch the potential across the capacitor and resistor change with time. The resultant graph can be used for further calculations.
Matter resource from the University of Liverpool
Charge and field plotter
A great little animation. Place charges on the page and use sensors to show the direction of the E field or the plotter to plot field lines.
Current / water analogy
An analogy using water flow to represent the current flowing in a D.C. circuit. (Current is the rate of flow of charge). Another flash from David Harrison.
A simple flash movie of a cyclotron. A charged particle is accelerated by an alternating field (square wave) between the two dees and then bent by a magnetic field in the D. The3 radius increases as the particle energy increases.
E field - oscillating charge
A simple animation to show how an electric field is influenced by a charge oscillating in one plane.
- Electricity & Magnetism
From the Matter project at the University of Liverpool
- GCSE.com Electricity
A simple animation showing that a current is created when a magnetic field is moved through a coil of wire.
Oscilloscope - fast, a.c.
Oscilloscope with a.c. input and faster timebase. Try checking the setting with a stopwatch.
Oscilloscope - no input
Adjusting the timebase for an oscilloscope. Try checking the settings with a stopwatch. Note the scale changes automatically (eventually)
Oscilloscope - slow, a.c.
Oscilloscope slow timebase with a.c. input.
Point Charge Electric Field
Different representations of the electric field due to a point charge - another excellent flash file from David Harrison.
Another animation showing the relationship between Potential, current and resistance. Try adjusting each and see what happens.
An animation to show the relationship between resistance, resistivity, length and area. Try adjusting each in turn and see what happens.
Resistors in Series and Parallel
Matters resource from the University of Liverpool (uses Java)
An example of the circuit for a simple buzzer. Making the circuit causes a field in the coil which attracts the clapper and hence breaks the circuit restarting the entire process.