Notes
Reading material from teachers and learners: theory, worked examples and questions that make you think. Some notes are made with AI, and they always say so.
Choose a topic to see its subtopics.66 notes
Wave MotionHigh School (11–12)
Waves and Sound: Quick Revision
Wave speed, interference and beats, standing waves on strings and in pipes, the resonance tube, and the Doppler effect. With the usual slips and questions to check yourself.
Relative MotionHigh School (11–12)
Relative Motion: Quick Revision
Relative velocity along a line, meeting and catching up, position-time graphs, and relative velocity in two dimensions with rain, rivers and wind. With the usual slips and questions to check yourself.
Dual Nature of Radiation and MatterHigh School (11–12)
Modern Physics: Quick Revision
Photons and the photoelectric effect, the stopping potential and its graph, Bohr's levels of hydrogen and its spectral series, and the de Broglie wavelength of matter. With the usual slips and questions to check yourself.
Current ElectricityHigh School (11–12)
Electric Circuits: Quick Revision
Ohm's law, resistors in series and in parallel, Kirchhoff's rules, cells with internal resistance, the most power a battery can give, and the Wheatstone bridge. With the usual slips and questions to check yourself.
Electromagnetic InductionHigh School (9–10)
Electromagnetic Induction and Household Circuits: Quick Revision
Electromagnetic induction and Fleming's right-hand rule, the AC and DC generator, frequency and the mains, and safe house wiring with fuses and the earth wire. With the usual slips and questions to check yourself.
Magnetic Effects of CurrentHigh School (9–10)
Force on a Current and the Electric Motor: Quick Revision
The force on a current, Fleming's left-hand rule, the DC motor and its split ring, the turning effect of a coil, the galvanometer and the loudspeaker. With the usual slips and questions to check yourself.
Magnetic Effects of CurrentHigh School (9–10)
Magnets and the Magnetic Field of a Current: Quick Revision
Poles and field lines, Oersted's discovery, the field of a straight wire and the right-hand thumb rule, coils, solenoids and electromagnets. With the usual slips and questions to check yourself.
Current ElectricityHigh School (9–10)
Heat, Power and Energy at Home: Quick Revision
Joule's law of heating, electric power and appliance ratings, the kilowatt hour and the electricity bill, and fuses. With the usual slips and questions to check yourself.
Current ElectricityHigh School (9–10)
Resistance and Combinations of Resistors: Quick Revision
What decides a wire's resistance, resistivity, resistors in series and in parallel, and mixed circuits. With the usual slips and questions to check yourself.
Current ElectricityHigh School (9–10)
Current, Potential Difference and Ohm's Law: Quick Revision
Charge and current, potential difference and work, the ammeter and the voltmeter, and Ohm's law with its graph. With the usual slips and questions to check yourself.
Light in the AtmosphereHigh School (9–10)
Light in the Atmosphere: Quick Revision
Atmospheric refraction and twinkling stars, early sunrise and late sunset, scattering and the Tyndall effect, the blue sky, red sunsets and white clouds. With the usual slips and questions to check yourself.
Prisms and Dispersion of LightHigh School (9–10)
Prisms, Dispersion and the Rainbow: Quick Revision
The path of a ray through a prism and its deviation, dispersion into a spectrum, Newton's experiments, and how raindrops make a rainbow. With the usual slips and questions to check yourself.
The Human Eye and VisionHigh School (9–10)
The Eye and Seeing: Quick Revision
The parts of the eye, the image on the retina, accommodation and the range of vision, and short and long sight with their lenses. With the usual slips and questions to check yourself.
Lenses and Optical InstrumentsHigh School (9–10)
Lenses and Their Power: Quick Revision
Convex and concave lenses, their images, the lens formula with its signs, and the power of a lens in dioptres. With the usual slips and questions to check yourself.
Refraction of LightHigh School (9–10)
Refraction of Light: Quick Revision
Why and which way light bends, Snell's law, the refractive index, the glass slab and why water looks shallow. With the usual slips and questions to check yourself.
Reflection of LightHigh School (9–10)
Reflection and Mirrors: Quick Revision
The laws of reflection, the plane mirror, spherical mirrors and their images, and the mirror formula with its signs. With the usual slips and questions to check yourself.
Sound Waves and HearingHigh School (9–10)
Echoes, Hearing and Ultrasound: Quick Revision
Echoes and the 0.1 s rule, reverberation, the human ear and the range of hearing, and ultrasound and SONAR, with the usual slips and questions to check yourself.
Wave MotionHigh School (9–10)
Describing a Sound Wave: Quick Revision
Wavelength, frequency, time period and amplitude, the wave equation , and loudness, pitch and quality, with the usual slips and questions to check yourself.
Sound Waves and HearingHigh School (9–10)
How Sound Is Made and Travels: Quick Revision
Vibrations, the medium, compressions and rarefactions, longitudinal waves, and the speed of sound in air, water and solids and with temperature, with the usual slips and questions to check yourself.
Work, Energy and PowerHigh School (9–10)
Conservation of Energy and Power: Quick Revision
The conservation of energy in falls and swings, power and its units, and the kilowatt hour on an electricity bill, with the usual slips and questions to check yourself.
Work, Energy and PowerHigh School (9–10)
Kinetic and Potential Energy: Quick Revision
Energy and its forms, kinetic energy and how it grows with speed, work and the change in kinetic energy, and potential energy and the level it is measured from, with the usual slips and questions to check yourself.
Work, Energy and PowerHigh School (9–10)
Work and Its Measurement: Quick Revision
When a force does work, and the joule, positive, negative and zero work, and the work done in lifting and against friction, with the usual slips and questions to check yourself.
Pressure and FluidsHigh School (9–10)
Pressure and Buoyancy: Quick Revision
Thrust and pressure, pressure in liquids and the air, the buoyant force and Archimedes' principle, floating and sinking, and relative density, with the usual slips and questions to check yourself.
GravitationHigh School (9–10)
Mass, Weight and Free Fall: Quick Revision
Free fall and the equations for a falling or thrown object, mass and weight and why they differ, weight on the Moon and other planets, and why astronauts float, with the usual slips and questions to check yourself.
GravitationHigh School (9–10)
The Law of Gravitation: Quick Revision
The universal law of gravitation, the constant G, how the pull changes with mass and distance, and the value of g on the Earth and other bodies, with the usual slips and questions to check yourself.