In this age of rapid technological development, it is worth pausing for a moment to understand what a magnetic field actually is. It is not just a concept from physics lessons – it is a phenomenon which has a real impact on our everyday lives. A magnetic field is a state of space in which […]
Gauss’s law is one of the basic laws of electrostatics. It combines two concepts: electric field and charge. In the simplest terms: it tells us how much electric field ‘passes’ through a given closed surface in space. And also how this relates to the charge inside this surface. In this step-by-step guide we will explain:
At first glance, the theme of light and sound seems orderly and predictable. Waves travel in straight lines, reach their destination and disappear. But when they encounter obstacles or narrow gaps, they can behave quite differently than we might think. Instead of bouncing or stopping, they bend, change direction, spill out of bounds. This is
We are all familiar with the Doppler effect – just listen to how the tone of an ambulance siren changes as it passes by. As the vehicle approaches, we hear a higher tone, and as it moves away, a lower tone. This is the Doppler effect in practice. What’s more, it applies not only to
Imagine a summer day at the lake. The sun reflects off the surface of the water so strongly that you have to squint. You put on your polarised glasses and suddenly the dazzling glare disappears and you see details previously hidden beneath the surface of the water. Sound like magic? This is polarised light in
Analysing complex electrical circuits can be difficult at first, especially when the circuit contains many sources and resistors. One of the most commonly used techniques to simplify such calculations is the mesh current method – also known as mesh analysis or mesh analysis. This systematic tool allows the calculation of currents flowing in a circuit
Have you ever wondered how a battery works? You will encounter this magical device every day – in your phone, laptop, car or even a remote-controlled toy. Without batteries, modern technology would come to a standstill. In this article, we explain in an easy-to-understand way what a rechargeable battery is, how it works and what
Have you ever wondered why rubbing your hands together warms them up or why a car engine needs fuel to run? In both cases, the 1st law of thermodynamics, the fundamental law governing energy in our world, is at work. This law tells us that energy cannot be created from nothing or annihilated. It can
