With only the final Physics paper left to be sat in the this year's AQA Trilogy exams, you should now be giving your revision a final push. Magnetism and electromagnetism is a fairly compact stand-alone topic and is the ideal candidate for a quick refresher. The knowledge you need can be divided into six areas … Continue reading Key Facts: (Electro)Magnetism
Drawing Magnetic Fields
The shape of the magnetic field around a bar magnet should be familiar to you as it has been covered in detail in a previous article, which you can read here. But rather than just knowing this shape, it is important that you can describe how to investigate it. There are two versions of this … Continue reading Drawing Magnetic Fields
Transformers
The famous "electricity war" between Edison and Tesla wasn't just about electricity generation, it was also about electricity distribution. Edison's DC electricity couldn't be sent very far due to power losses but Tesla's AC could go much further and benefit people over a much wider area. Efficient electricity distribution relies on minimising power loses due … Continue reading Transformers
Electricity and Magnetism
Whenever a current flows through a wire, it creates its own magnetic field. This may be surprising given that copper, which is normally used for electric wires, is not a magnetic material, but it is true nevertheless. This fact was discovered almost exactly 200 years ago by the Danish physicist, Hans Christian Oersted and led … Continue reading Electricity and Magnetism
Magnetic fields
Magnetism is a well known effect that was observed in nature thousands of years ago. In fact, the word "magnetic" comes from the region of Greece where materials that could attract and repel each other were first discovered: this region was called Magnesia. The knowledge you need to have about magnets is very straightforward but … Continue reading Magnetic fields
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