Embedded Files
Physics Essential Standards Covered:
Physics Essential Standards Covered:
Phy.2.3.1
Recognize that a difference in potential (voltage) creates current within a conductor; the amount of current also depends on the resistance of the conductor.
Develop a cause-and-effect model for current in a circuit - current is directly proportional to the voltage and inversely proportional to the resistance (Ohm’s law).
Given a schematic circuit diagram, determine current, voltage, or resistance from two known quantities.
Key Vocabulary:
Key Vocabulary:
- Voltage
- Current
- Resistance
- Conductor
- Ohm
- Circuit
- Electron Flow
Essential Question: What is electricity and how is it created?
Essential Question: What is electricity and how is it created?
Suggested Reading:
Suggested Reading:
Lesson:
Lesson:
Electricity! What we use everyday all day to power our lives!
Electricity! What we use everyday all day to power our lives!
Electricity Basics: electricity exists because of charged particles called electrons.
Electricity Basics: electricity exists because of charged particles called electrons.
Subatomic Particles of an Atom:
Subatomic Particles of an Atom:
- Protons: Positive
- Neutrons: Neutral
- Electrons: Negative
Atom Core - Nucleus
Atom Core - Nucleus
Remember that oppositely charged particles are attracted to each other, while like charged particles repel each other. (Just like the poles of magnet!)
Remember that oppositely charged particles are attracted to each other, while like charged particles repel each other. (Just like the poles of magnet!)
Because of this attraction and repulsion we get electricity!
Because of this attraction and repulsion we get electricity!
Static Electricity:
Static Electricity:
Let's first explore static electricity and how it is created.
Let's first explore static electricity and how it is created.
Static Electricity: The build up of extra charges on an object.
Static Electricity: The build up of extra charges on an object.
Static means not moving (or the charges aren't flowing like in electricity with a current).
Static means not moving (or the charges aren't flowing like in electricity with a current).
You can create static electricity from friction. Rubbing objects on to other objects causing friction and static to build.
You can create static electricity from friction. Rubbing objects on to other objects causing friction and static to build.
Sometimes enough static electricity builds up that it wants to find a way to become "grounded."
Sometimes enough static electricity builds up that it wants to find a way to become "grounded."
Grounded, meaning the charges will try to electrically discharge.
Grounded, meaning the charges will try to electrically discharge.
This happens when you have enough statically charged electrons that are attracted to positively charged particles somewhere else and you get a shock.
This happens when you have enough statically charged electrons that are attracted to positively charged particles somewhere else and you get a shock.
This is exactly why you shock something after you shuffle around in your socks on the ground or get up after you have sat on a couch for a while. You are electrically discharging the static electricity that has built up on you.
This is exactly why you shock something after you shuffle around in your socks on the ground or get up after you have sat on a couch for a while. You are electrically discharging the static electricity that has built up on you.
Van De Graaff Generator
Van De Graaff Generator
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