Calculating Lightning Distances
Watch the sky for a flash of lightning.Count the number of seconds until you hear thunder.Divide the number of seconds by 5 to calculate the distance the storm is away from your location in miles (or divide...
Electrical Capacitance
You must have heard of the word capacity, for example the capacity of the stadium, or the capacity of the lungs. The word stadium capacity means: How many stadiums can visitors receive. so, by analogy, the word electrical...
Static electricity is the result of an imbalance between negative and positive charges in an object. These charges can build up on the surface of an object until they find a way to be released or discharged.
There are three...
Charging by friction, contact or induction. If you rub a balloon on your hair, electrons will be rubbed off your hair onto the balloon (charging by friction).
If you then place the negatively charged balloon near a neutral wall, the balloon...
Electricity has a very long history.The Greek philosopher Thales of Miletus (640 - 546 B.C.) is sometimes credited with being the first person to notice that amber will pick up bits of dry grass or straw if it is...
Electric potential energy
Charges also have electrical potential energy. We learned that in work power energy chapter, objects have potential energy because of their positions. In this case charge in an electric field has also potential energy because of its...
Charles-Augustin de Coulomb was a French physicist and inventor. He is known for his contributions in the fields of physics that study electricity and magnetism, and the author of a theory called the Coulomb’s law.
Coulomb defined the electrostatic force...
