If you were to split a magnet, half of the magnet would stay north, while half would become south. See the picture below:
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This is a picture of Magnetic Filed Lines.
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Thursday, March 8, 2012
Permanent Magnets
Magnets have a north pole and a south pole. 'Like magnetic poles attract eachother, opposite magnetic poles attract one another.'
If you were to split a magnet, half of the magnet would stay north, while half would become south. See the picture below:
.JPG)
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If you were to split a magnet, half of the magnet would stay north, while half would become south. See the picture below:
Magnetism
"All magnetic force results from the movement of charged particles."
"Certain materials under certian conditions can have their atoms arranged so that the electrons have the same general motion."
-Exploring Creation With Physical Science chapter 12 page 305
Some materials can simply not be magnetic because of their atoms. For example, you cannot take a refigerator magnet and stick it on one of the walls.
"Certain materials under certian conditions can have their atoms arranged so that the electrons have the same general motion."
-Exploring Creation With Physical Science chapter 12 page 305
Some materials can simply not be magnetic because of their atoms. For example, you cannot take a refigerator magnet and stick it on one of the walls.
Series and Parallel Circuits
"The idea that a break in an electrical circuitcan stop the currernt flow and thus stop the electrical device or devices in the circuit is quite useful most of the time. However, sometimesit's a real problem. Consider, for example the following circuit:"
Even though only one lightbulb is broken, neither will work. The idea is that the electrons flow through the filament in the light bulb. Notice that on the one light bulb, the filament is broken....therefore, the electrons cannot get to the next light bulb. Several years ago, if you had Christmas tree lights and one burnt out, none of them would turn on. You had to replace all the light bulbs because you didn't know which one was burnt out. Now, they have changed the way the lights are made so that when one burns out, the others will still light up. The picture above is a series circuit. A series circuit is when the electrons flow through the filament. The picture below is a parallel circuit.
The electrons cannot flow through the filament in the burnt out light bulb but they can still flow from one side of the battery to the other.
Even though only one lightbulb is broken, neither will work. The idea is that the electrons flow through the filament in the light bulb. Notice that on the one light bulb, the filament is broken....therefore, the electrons cannot get to the next light bulb. Several years ago, if you had Christmas tree lights and one burnt out, none of them would turn on. You had to replace all the light bulbs because you didn't know which one was burnt out. Now, they have changed the way the lights are made so that when one burns out, the others will still light up. The picture above is a series circuit. A series circuit is when the electrons flow through the filament. The picture below is a parallel circuit. 
The electrons cannot flow through the filament in the burnt out light bulb but they can still flow from one side of the battery to the other.
Tuesday, March 6, 2012
Switches and Circuits
We are now going to learn about open circuits. This will hopefully show you how light switches and other things to the same effect work. First, let me give you the definition of an open circuit. Open circuit- a circuit that does not have a complete connection with between the two ides of the power source. As a result, current does not flow.
You can now see how when you flip a light switch, you are allowing a path for the electricity to flow in. The same thing works when you turn the light off but vise versa.
You can now see how when you flip a light switch, you are allowing a path for the electricity to flow in. The same thing works when you turn the light off but vise versa.
Electrical Circuits
Did you know that the force that exists between charged particles can be used to make electrical circuits? For example, when a light bulb is hooked up to an electrical circuit, the bulb glows.
For electrical charges to get moving, you need something that uses electromagnetic force, such as a battery. One side of the battery contains chemicals that wish to use electrons, while the other side contains chemicals that wish to gain electrons. Therefore, one side of the battery is a source of electrons, so it's negative. They also have a positive side. When two sides of a battery are hooked together with metal, electrons will flow through the metal from the negative side of a battery to the positive side.
The number of electrons that flow through a circuit in a given amount of time can be determined by examining the electrical current in a circuit.
Electrical Current- the amount of charge that travels past a fixed point in an electrical circuit each second.
For electrical charges to get moving, you need something that uses electromagnetic force, such as a battery. One side of the battery contains chemicals that wish to use electrons, while the other side contains chemicals that wish to gain electrons. Therefore, one side of the battery is a source of electrons, so it's negative. They also have a positive side. When two sides of a battery are hooked together with metal, electrons will flow through the metal from the negative side of a battery to the positive side.
The number of electrons that flow through a circuit in a given amount of time can be determined by examining the electrical current in a circuit.
Electrical Current- the amount of charge that travels past a fixed point in an electrical circuit each second.
Tuesday, February 28, 2012
How objects become electrically charged
Before I start explaining, you should know these vocabulary words:
Charging by conduction- charging an object by allowing it to come into contact with an object that already has an electrical charge.
Charging by induction- charging an object without direct contact between the object and the charge.
Like charges repel each other:
This means that two positively or negatively charged objects will repel, not attract each other. The first object will exert a repulsive force on the second, and Newton's Third Law shows that the second object will exert an equal and opposite force on the first.
Opposite charges attract one another:
This means that when a negatively charged particle is in proximity to a positively charged particle, a mutual attractive force will develop. The first will exert a force on the second, and according to Newton's Third Law, the second will exert an equal and opposite force on the first.
Principles of Gravitational Force:
1. All electrical charges attract or repel one another: charges repel, while opposite charges attract.
2. The force between charged objects is directly proportional to the amount of electrical charge on each object.
3. The force between charged objects is directly proportional to the square of the distance between the two objects.
These two photos show the positive and negative attractions that I have posted about!
Charging by conduction- charging an object by allowing it to come into contact with an object that already has an electrical charge.
Charging by induction- charging an object without direct contact between the object and the charge.
Like charges repel each other:
This means that two positively or negatively charged objects will repel, not attract each other. The first object will exert a repulsive force on the second, and Newton's Third Law shows that the second object will exert an equal and opposite force on the first.
Opposite charges attract one another:
This means that when a negatively charged particle is in proximity to a positively charged particle, a mutual attractive force will develop. The first will exert a force on the second, and according to Newton's Third Law, the second will exert an equal and opposite force on the first.
Principles of Gravitational Force:
1. All electrical charges attract or repel one another: charges repel, while opposite charges attract.
2. The force between charged objects is directly proportional to the amount of electrical charge on each object.
3. The force between charged objects is directly proportional to the square of the distance between the two objects.
These two photos show the positive and negative attractions that I have posted about!
Resistance
Resistance -- the ability of a material to impede the flow of charge
For example, the wires on the inside of a toaster or the coil on an electrical stove or a space heater are all objects that have electrons and resistance.
"One way we get electrons to do something useful in an electrical circuit is to use a metal's resistance to convert the energy of the electrons speeding through the circuit into heat and light."
--Exploring Creation with Physical Science by Dr. While (chapter 12 pg. 301)
For example, the wires on the inside of a toaster or the coil on an electrical stove or a space heater are all objects that have electrons and resistance.
"One way we get electrons to do something useful in an electrical circuit is to use a metal's resistance to convert the energy of the electrons speeding through the circuit into heat and light."
--Exploring Creation with Physical Science by Dr. While (chapter 12 pg. 301)
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