Conductors are materials that allow the flow of electric current, whereas insulators do not. While conductors and insulators are different in that respect, their similarity is in their makeup of atoms. It is these atoms that either have room to float around to facilitate conduction or have little freedom to move around; this lack of freedom makes the material they form an insulator.Know More
While many types of conductors exist, copper is by far the best known conductor of heat, while rubber is the best known insulator in existence, according to Kid's Korner Energy Education from Florida Power & Light Company. A conductor is simply a substance in which the outer electrons of the atoms are free to move around. In sharp contrast, most insulators tightly hold on to their atoms.
Not all conductors have the same level of conductivity, just as not all insulators are resistant to electric current. While silver is one of the best conductors of heat, concrete and dirty water are also listed as heat conductors, though they are not as effective as other conductive materials such as most metals. Similarly, while glass is a good insulator at room temperatures, it becomes a conductor of heat when it is exposed to extreme temperatures.Learn more in Electricity
Lightning is caused by an electric current inside a thundercloud that connects with the ground beneath the cloud. Lightning occurs when tiny pieces of ice start bumping into one another as they travel through the air. The collisions of ice generate an electric charge inside the cloud.Full Answer >
Live wires carry electric current toward a device, such as a main-powered appliance, while neutral wires carry electric current away from the device to close an electric circuit. Live wires are typically blue in color, while neutral wires are usually brown.Full Answer >
A dynamo generates electricity by using a magnetic field to imbue wires with an electric current. According to the Edison Tech Center, this process generates a direct current that can then be fed down the wires to an alternator for conversion to an alternating current; these alternators are sometimes known as generators.Full Answer >
A transformer changes the voltage of an electric current while transferring it from one circuit to another through electromagnetic induction. Fluctuating magnetic fields in the transformer generate an electric current in a coil of wire, and the voltage they put out is directly proportional to the number of turns in the coil of wire.Full Answer >