Category: Physics AS

Physics G492 AS Revision Notes

Below are some revision notes about the G492 paper for Physics A level. You may want to also look at Section C Revision Notes too. Feel free to skip to the parts most relevant to you. Displacement – Time Graphs The displacement is a distance is a specific …

Physics G492 Data Handling Insert June 2012 Help

Anyone who takes Physics AS will know that although the topics you learn about are a big contribution to the final mark of the G492 exam, they only account for 60% of all the marks. The last 40% comes from something you can prepare for. You are giving …

Signalling – Chapter 3 – Physics AS

This article will go over all you need to know in the A Level Physics which includes advantages of digital signalling, analogue signalling, converting between digital to analogue and analogue to digital, sampling, polarisation, sensing circuits, resolution, bandwidth and a sampling summary including sampling rate and channel capacity (I think …

Controlling Conductivity and Simple Band Theory

All solids can be broadly grouped into one of three categories: Metals and metallic conductors – this includes all metals and carbon.  ρ (resistivity) is low and increases as temperature increases. Insulators – most of them are non-metals, plastics and much are organic materials if dry.  Semi-conductors – …

Faults in Crystalline Structures

A perfect crystal very rarely occurs in nature and is very difficult to produce artificially. All crystals contains faults. Sometimes, they contain too many faults (or too few) and the result is reduced properties being less tough, having less strength and being less stiff.To remind ourself of the above terms: Dislocation …

Composite Materials – Physics A Level

Composites have many different properties which makes the material a composite. Firstly, here are a few things you should know about composite materials. Made from more than one material. Different materials can be combined in a variety of ways. The results combines certain properties of each individual component material. Parts are arranged …

Tensile Strength, Stiffness, Strain and Young Modulus

In this article, I will be looking at the tensile strength, stiffness, Hooke’s law, how to use Hooke’s law, Young Modulus (E) and example questions. The theory for working out tensile strength and stiffness is relatively simple to use. However, before anything, let’s start with the definitions of …

Sensing – Chapter 2 – Physics AS

In this article I will go through all you need to know for Physics AS on Chapter 2. This will include going over in order (I think!) current, flow of charge per second, voltage (or potential difference), resistance in series and parallel, potential dividers, internal resistance and EMF …

Magnification in Convex Lenses

You should know how to work out magnification in convex lenses for Physics A Level. Magnification happens in convex lens through the formula: Magnification = image height / object height = V/U From the below diagram, we can see the object height and image height as well as …

Wave Fronts On a Convex Lens

Wave fronts on convex lenses help us identify the focal length of the lens which identifies the power of it too using P = 1/F. Wave fronts on lenses are more easily described through the use of diagrams. As you can see from this diagram, the focal length is the …