Electricity was recognized to exist since occasions when amber and fur was rubbed together from the ancient Greeks, creating the manufacture of static electricity.
The first remarkable achievement in this subject was by Alessandro Volta, an Italian physicist, who developed the first circuit in 1800. Also, he demonstrated that a circuit have to be closed, or complete, to ensure electricity to circulate through it. Science fair experiments could be conducted using circuits that demonstrate this principle.
Volta’s student, Georg Simon Ohm, made another discovery in 1826. He observed that some materials would not allow electricity to give freely. To put it differently, they resisted the flowing of electricity through them. This resistance of the circuit is measured by the unit called ohms and is also abbreviated with the Greek letter omega (?).
Things allow electricity to maneuver through them whereas others do not let it to go very well. Those materials which enable electricity to move through choices referred to as conductive materials. Those materials that resist the passage of electricity through options called insulators. The resistance of conductive materials are low whereas the resistance of insulators is high. We could use copper wire as being a conductor and plastic coating as a possible insulator.
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