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Wednesday, September 22, 2021
Electricity and Magnetism

# Electricity and Magnetism

### Electric charge is conserved

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...

### Electrical Influence – Charge distribution on the conductor

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...

### Resistance in a Wire

Resistance The electrical resistance of an electrical element measures its opposition to the passage of an electric current; the inverse quantity is electrical conductance, measuring how easily electricity flows along a certain path. Electrical resistance shares some conceptual parallels with...

### Coulomb’s Law and Electric Field

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...

### Electric current

Electric current Electricity is produced when an electron moves after being taken away from an atom. Review that atoms make up all matter. Atoms are usually electrically balanced, there are as many positive charges (protons) as there are negative charges...

### Electric potential energy

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...

### Electrostatics

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...

### Capacitance – Capacitance of two parallel plates

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...

### Electrical phenomena in the atmosphere-lightning

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...