Homemade Battery Using Seawater
There is no better way to learn about science that doing it right and you have to admit most of us love a good do-it-yourself project especially if it produces a cool and unexpected result.
Electromagnet
An electromagnet is a type of magnet in which the magnetic field is produced by an electric current. The magnetic field disappears when the current is turned off. Electromagnets usually consist of a large number of closely spaced turns of wire that create the magnetic field. The wire turns are often wound around a magnetic core made from a ferromagnetic or ferrimagnetic material such as iron; the magnetic core concentrates the magnetic flux and makes a more powerful magnet.
Ohm's Law
The relationship between Voltage, Current and Resistance in any DC electrical circuit was firstly discovered by the German physicist Georg Ohm. Ohm found that, at a constant temperature, the electrical current flowing through a fixed linear resistance is directly proportional to the voltage applied across it, and also inversely proportional to the resistance. This relationship between the Voltage, Current and Resistance forms the bases of Ohms Law and is shown below.
Interactive simulation to learn parallel and series circuits
Interactive simulation to learn parallel and series circuits
Read more: Interactive simulation to learn parallel and series circuits
ABB introduces new line of heavy duty safety switches
The ABB Low Voltage Products division has introduced a new line of heavy duty safety switches for commercial and industrial applications, meeting the necessary UL98, CSA and NEMA KS-1 standards for the most demanding service-entrance and motor-load applications.
Read more: ABB introduces new line of heavy duty safety switches
Georg Simon Ohm und der elektrische Widerstand
Georg Simon Ohm erkannte den Zusammenhang zwischen Stromstärke, Spannung und Widerstand. Mit dem Ohmschen Gesetz legte er den Grundstein für Telegraphie, Elektronik und Mikroelektronik.
What is Electricity ?
Electricity is a natural phenomenon that occurs throughout nature and takes many different forms. In this tutorial we’ll focus on current electricity: the stuff that powers our electronic gadgets. Our goal is to understand how electricity flows from a power source through wires, lighting up LEDs, spinning motors, and powering our communication devices.
