Electric Charges and Current

Imagine you had to move a rock that was bigger than you were.

Would this work?? Why or Why not?

What about this?? Why or why not?

What about this?? WHY OR WHY NOT?

Force There is a greater overall force if multiple forces are all pulling/pushing in the same direction.

electron movement in an insulator electron movement in a conductor LG: to understand the basics of current electricity Current Electricity: the controlled flow of electrons through a conductor

What is the difference? Static Electricity and Electrical Current are made of the same thing, electrons. However, in static electricity there is a build up of electrons on an object or area; while electrical current is the flow of electrons in a specific direction.

Electric Current Electrical devices need a steady flow of electricity. The steady flow of charged particles is called electrical current. The flow continues until the energy source is used up, or disconnected.

Conductors Allow the easy flow of electricity, loosely bound electrons that are free to move from atom to atom metals like aluminum, gold, copper and silver are examples of good conductors.

Insulators Insulators – resists the flow of electrons making the object safe to handle plastic, rubber, glass Keep charges away from body

Resistors Resistors-allow electrons to flow but slow them down considerably. This allows the current to slow down.

Superconductors There are some materials that have practically no resistance at extremely low temperatures. These are called Superconductors. Superconductors have many uses including use in power lines to increase efficiency as well as in computers to improve speed.

Grounding As discussed charges/electricity likes to move through lines with lower resistance. Because of this we have developed a procedure known as grounding. Grounding means providing a harmless, low-resistance path-a ground- for electricity to flow. This is used to protect buildings from damage from lightning strikes. A “Lighting Rod” moves lighting strikes into the ground where the charge is absorbed.

The nature of Electrons Electrons are lazy. They only move together when they “have” to and have a couple things in place. An easy, complete, route to follow. (Circuit) Pressure to push them through the circuit. (Voltage)

VOLTAGE (V) It is the push or pressure behind current flow through a circuit, and is measured in (V) volts. 

CURRENT Current refers to the quantity/volume of electrical flow. Measured in Amps (A)

RESISTANCE  Resistance to the flow of the current. Measured in Ohms. How much energy is “lost” in the circuit as the electrons pass through it.

https://www.youtube.com/watch?v=zYS9kdS56l8

Before you leave Write down 4 things you learned about today in detail. Must be in sentence form.

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Activity Tug of War

Electric Charges and Current

Water gun What makes a water gun shoot out water?