Category Archives: Electricity and Magnetism

What If – Yao Zhecheng

What if the universe we live in has a different Planck constant? What if high-temperature superconductors are discovered? What if we can store the power of lightening for everyday use? This week’s fact of the week will seek to provide … Continue reading

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Magnetorheological fluid – Catharine Lo

Remember the ferrofluid that Luyu introduced during the camp.  It is made up of nanoparticles of ferromaterials that become magnetised under a magnetic field.  Now let us look at another type of fluid. A magnetorheological fluid (MR fluid) is another … Continue reading

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Alternating Currents – Lin Jiahuang

Introduction Current, in general, is caused by the net flow of charges in a certain direction. This net flow of charges is caused by the electric field. An electric field will accelerate charges and as charges are accelerated, they start … Continue reading

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Induction Cooking – Cheng Tianran

What Is “Induction Cooking”? Cooking is the application of heat to food. Food being prepared in the home is very rarely if ever cooked on a rangetop except in or on a cooking vessel of some sort–pot, pan, whatever. Thus, … Continue reading

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Larmor Formula – Catharine Lo

with some edits by Li Kewei The Larmor formula is used to calculate the total power radiated by a nonrelativistic point charge as it accelerates.  When accelerating, any charged particle (such as an electron) radiates away energy in the form of EM waves. When the … Continue reading

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What is the speed of electricity? – Cheng Luyu

We shall start off with the famous figure: 299792458. Of course people know (at least physicists) what this number represents at a glance. Yes, the speed of light, the supposed limit to the velocity of objects. (I’m quite curious about … Continue reading

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