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Centre of Mass _ GCSE Physics
The centre of mass of an object is the point where the entire weight of an object appears to act. Working out the centre of mass of a symmetrical object is easy; it’s simply the point where the lines of symmetry cross. However it’s very...
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Series and Parallel Circuits _ GCSE Physics
There are two kinds of electrical circuits, series and parallel. Components that are connected one after another on the same loop of the circuit are connected in series. If one lamp were to break in a series circuit, all the lamps would...
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Work Done and Power _ GCSE Physics
Work is the amount of energy transferred when a force moves something. For example when you carry something upstairs or a lift a heavy object, work is being done. You can calculate the amount of work being done by knowing the force...
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Total Internal Reflection _ GCSE Physics
Optical fibres can carry information using visible light and something called total internal reflection. It works by bouncing waves off the sides of a thin piece of plastic or glass until it emerges at the end. Total internal reflection...
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The Motor Effect _ GCSE Physics
When a current passes through a wire it produces a magnetic field. If you put this magnetic field in another magnetic field, it puts a force on the wire. This is known as the motor effect. To determine the direction of the force you use...
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Circular Motion _ GCSE Physics
Circular motion is quite self-explanatory really; it’s simply the physics behind things moving in circles. When something moves in a circle it’s velocity is constantly changing, even if its speed is constant. This is because velocity is...
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Diodes, LEDs, Thermistors and LDRs _ GCSE Physics
Diodes are electronic components, which can be used to regulate the potential difference in circuits and to make logic gates. Diodes have a very high resistance in one direction, (ideally infinite) and a very low resistance in the other...
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Energy Transfer and Efficiency _ GCSE Physics
Different types of energy can be transferred from one type to another. You can see that a car engine transfers chemical energy, which is stored in the fuel, into kinetic energy in the engine and wheels so it can get you from A to B. In a...
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Hooke's Law _ GCSE Physics
Doodle Science teaches you high school physics in a less boring way in almost no time! Script: Elastic objects (such as a spring) can store elastic potential energy when they are stretched. For example this happens when a catapult is...
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Hydraulics _ GCSE Physics
Hydraulics might sound complicated but all they are, is another force multiplier. They utilise the fact that liquids are virtually incompressible, which means when you compress them, the pressure you apply to one point of the liquid is...
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Correcting Vision _ GCSE Physics
Vision defects generally come in two different ways called short sightedness and long sightedness. A person who has short sight can see near objects clearly, but struggles to focus on distant ones. This is caused by one or two reasons....
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The Kinetic Theory _ GCSE Physics
1. The kinetic theory explains the properties of the different states of matter. 2. All the particles in a solid liquid and gas are the same, the only thing that changes, is the amount of energy they have (turbine drawing). 3. Solids...
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Resistance _ GCSE Physics
An electric current flows when electrons move through a conductor, such as a metal wire. The moving electrons can collide with the ions in the metal. This makes it more difficult for the current to flow, and causes resistance. The length...
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Transformers and the National Grid _ GCSE Physics
Electricity is transferred from power stations to consumers through the wires and cables of the National Grid. When a current flows through a wire some energy is lost as heat. The higher the current, the more heat is lost. To reduce...
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Distance-Time and Velocity-Time Graphs _ GCSE Physics
When were talking about motion, it can be very useful to draw a graph. If you're moving in a straight line, a graph that's useful is a distance-time graph; this is where you have distance on the Y-axis and time on the X. If we mark this...
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Refraction and Refractive Index _ GCSE Physics
Doodle Science teaches you high school physics in a less boring way in almost no time! GCSE Science
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Life Cycle of Stars _ GCSE Physics
Doodle Science teaches you high school physics in a less boring way in almost no time! GCSE Science
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Nuclear Fission and Fusion _ GCSE Physics
Doodle Science teaches you high school physics in a less boring way in almost no time! GCSE Science
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X-Rays _ GCSE Physics
X-Rays are part of the electromagnetic spectrum and have a wavelength of about the diameter of an atom. Because of this small wavelength they are able to penetrate healthy tissue but are absorbed by denser material like bone and metal....
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AC and DC supply _ GCSE Physics
Electrical supplies can be direct current or alternating current. It's referred to as AC/DC but not rock band of course. If the current flows in one direction it is called direct current. Batteries supply DC current to most of your...
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Non-Renewable Energy Resources _ GCSE Physics
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Diverging Lenses _ GCSE Physics
A diverging lens is sort of like the opposite of a converging lens because it curves inwards instead of outwards. It is represented with this symbol, interesting I know. Diverging lenses refract the light in a way, which makes them...
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Heat Transfer - Conduction and Convection _ GCSE Physics
Conduction is the transfer of heat between substances that are in direct contact with each other and it mainly happens in solids. The heat is conducted from atom to atom using the kinetic energy of the particles, in other words by...
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Newton's Laws of Motion _ A-Level Physics
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