Our next unit will cover energy resources and the way that we create and use energy as a society. We often turn on light switches without thinking about where that energy comes from. As we have discussed, one of the laws of energy states that energy cannot be created or destroyed, only transfered (or transformed). So when we turn on that light switch, where does it come from?
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Go to the following link: HowStuffWorks.com
Scroll down and watch the video titled "Electricity and Magnetism: Electric Current."
Write 10 facts down that you learned from the video.
16 comments:
There is a current in any cord that goes from outlet to an electrical object.
Currents are measured in amps.
There are two types of currents alternating and direct.
Direct current usually comes from batteries.
Alternating current is the kind of current that is used to power buildings like schools and business buildings.
Alternating current has its name because to produce electricity magnets spin in a coil of wire.
In the United States the currents alternate rate is about 120 times per second.
A current must in a circle.
From the source through the wire to the object around and back to the source.
The way a cord is shaped helps there be not as much electric current failure as much.
Electric current is the amount of electricity going though something
Electric current's measurement is called Amps
Alternating Current and Direct Current are both types of current
Batteries create what is called Direct Current
The current that we use in our houses and other buildings is alternating current
Alternating Current is produced in power plants
Alternating Current is called Alternating Current because the current alternates in direction :)
You need a full, complete circuit to make electricity
An Open Circuit is when a circuit is not complete
The small hole in an outlet makes it less likely for electrical failures
Mike
Current is the flow of electricity
The amount of current flow is measured in amps.
There is direct current and alternating current
Direct current is most commonly found in batteries
Direct current only goes in 1 direction
Alternating current powers homes and schools
Alternating current is mass produced in powerplants.
If you rub a magnet in a coil, electricity goes in alternating directions
Electricity has to have a closed loop
There are holes in outlets so electricity won't fail
Electric current Continues flow of charge through a wire
current is measured in amps
Water is like current
two types of current
AC - alternating current
DC- direct current
we get DC from batteries
AC is used in homes businesses and schools
AC developed at power plant
AC- Magnets spin in a coil of wire which create a electric current.
DIGGY DOG D
:current is the rate of charge past a certain point
:measured in amps
:two types of current , alternating and direct
:alternating comes from power plants and is used because it is easy to send it to homes
:direct is more in batteries
:Direct goes in 1 direction
:current alternates at a rate of 120 times per sec.
:in a closed circuit you need three components, a source of current, a path of current and a device to use the current.
:In an open circuit if you had a light, it wouldn't work it needs to be closed.
:a plug has holes in it to keep the wired connected to it inside the outlet.
Electric current is the flow of electric charge
alternate current and direct current (ac/dc)
how a circuit works
currents are measured in amps
alternating current is used in buildings
when a magnet is moved through a coil of wire it creates an electric current is produced
to have a circuit you have to have a source of electrons, a path for the electrons, and a device for the electrons
Currents travel in 2 different ways alternating and direct.
Direct is in batteries, it goes directly into the object it is powering.
Alternating comes from power plants, and supplies buildings through an intricate route.
Electricity can only be used with a complete circuit
A complete circuit travels in one whole circle.
copper atoms holds electrons loosely, making them a good conductor
Switches are used to open the current, making it incomplete and cutting off the power.
The 3rd prong on a plug is used to protect the plug incase of a short circuit
ac/dc gets its name from 2 different ways currents travel
The usual 2 plugs have holes in them that hook into prongs in the wall to keep it still
The greater the current, the more of a charge that passes that point
Alternating Current or AC
Direct Current or DC
Direct Current is the current we get from batteries.
Alternating Current Is use in homes,businesses,and schools.
It is called alternating current because it is used between magnets spin in a coil of wire.
When a magnet moves is a coil of wire an electric current is produced.
The current alternates at the rate of 120 times per second.
Battery,Wire,Flash light Bulb.=Source of electricity
The power cords have holes in them because there are these little bulbs that pop in and out to keep the cord in the socket.
. electric current is the rate of charge past a certain point
. current is measured in amps
. alternating current/ ac
. direct current/ dc
. batteries give off direct current
. alternative current is used in homes, business, and schools
. when magnet is moved in a coil of wire it creates a current
. a complete circuit needs a source of electrons, a path for the electrons , and a device to use the electrons
. when there is a break in the circuit it is called an open circuit
. the round hole on an outlet is to ground electricity so there will be less damage if the circuit gets shorted out
· Electric current is a continues flow of charge through wire
· Electric current is the rate of charge past a certain point
· Current is measured in amps
· There are two types of current alternating and direct current
· Alternating current is used in homes, schools
· In the United States the current alternates at the rate of 120 times per second or 60 cycles per second
· A circuit is made up of three parts, a source of electrons, a path for electrons, and a device to use electrons
· The greater the current the more charge that passes that point
· Direct current is the current we get from batteries
· The greater the current the higher the amperage
1. An electric current is the rate of change past a certain point.
2. Currents are measured in amps.
3. There are two types of current: alternating current and direct current.
4. Direct current always travels in one direction.
5. In 1831 Michal Faraday found that when a magnet moves in a coil of wire an electric current is produced.
6. In the U.S.A currents alternate at the rate of 120 tmes per second or you could say 60 complete cycles per second.
7. For a flow of electricity to occur you need a complete circuit.
8. A circuit is made of three parts: source of electrons, path for electrons, and a device to use electrons.
9. To make a simple circuit you can use a battery, wire, and a flashlight bulb.
10. When there is a break in the circuit, the circuit becomes an open circuit and the bulb will not light, but if there is no break then the bulb will light.
curents are mesured in amps.
a curent must alwayes flow in a circle.
DC curents are used in batteries.
in the US the curents alternate at 120 times per sec.
AC curents are used in homes, business, and schools.
an electric curent is the amount of electricty going trough somthing.
AC curents are created in power plants.
power plants use AC curents because it takes less energy to send it to your house.
an open circuit is when electricity is not running in a complete circle.
dc curents go only in one direction
10 facts that I learned from this video:
~ Electric current = the rate of charge past a certain point.
~The greater the current, the higher the average.
~ There are two types of currents. one is called alternating current, and the other is direct current
~ direct current is the kind we get from batteries.
~ alternating current is the kind we use in our homes, businesses and schools.
~ alternating currents are also developed in power plants.
~ Michael Faraday discovered in 1831 that when a magnet moves in a coil of wire, an electric current is produced
~ When the magnet goes into the coil, the needle moves one way, and when the magnet is pulled out, the needle goes the other way.
~ In the USA, the electric current alternates at the rate of 120 times per second...That's 60 complete cycles per second.
~ a complete circuit is made up of a couple of different things. a source of electrons, a path for electrons, and a device to use electrons.
Current is the flow of electricity
The amount of current flow is measured in amps.
There is direct current and alternating current
Direct current is most commonly found in batteries
Direct current only goes in 1 direction Alternating current powers homes and schools Alternating current is mass produced in powerplants. If you rub a magnet in a coil, electricity goes in alternating directions
Electricity has to have a closed loop There are holes in outlets so electricity won't fail.
bdog
dan i have no clue what happened to the last one someone had to delete it because i have it on file.
bdog
Electric current is the rate of charge past a certain point. Current is measured in amps or amperage. 2 types of current, alternating and direct. Direct usually comes from batteries. Alternating is what comes out of the plug in the wall. Generated in a power plant, AC is used because it is easier to send to homes and businesses. Produced when magnets spin in a coil of wire. When a magnet moves in a coil of wire, electric current is produced. In the US AC alternates 120 times/second
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