New Area of Focus: Magnetism Copyright © 2010 Ryan P. Murphy
Magnetism: The force produced by a magnetic field. Electric charges in motion. Copyright © 2010 Ryan P. Murphy
A magnet is an object or a device that gives off an external magnetic field. Copyright © 2010 Ryan P. Murphy
A magnet is an object or a device that gives off an external magnetic field. Copyright © 2010 Ryan P. Murphy
Demonstration – Iron filings over a magnetic field Sprinkle iron filings on a piece of paper. Create the two poles a magnetic field with a magnetic from underneath the paper. Identify the magnetic fields with a visual in your journal. Copyright © 2010 Ryan P. Murphy
Demonstration – Iron filings over a magnetic field Sprinkle iron filings on a piece of paper. Create the two poles a magnetic field with a magnetic from underneath the paper. Identify the magnetic fields with a visual in your journal. Copyright © 2010 Ryan P. Murphy
Demonstration – Iron filings over a magnetic field Sprinkle iron filings on a piece of paper. Create the two poles a magnetic field with a magnetic from underneath the paper. Identify the magnetic fields with a visual. Copyright © 2010 Ryan P. Murphy
Demonstration – Iron filings over a magnetic field Sprinkle iron filings on a piece of paper. Create the two poles a magnetic field with a magnetic from underneath the paper. Identify the magnetic fields with a visual. Copyright © 2010 Ryan P. Murphy
Demonstration – Iron filings over a magnetic field Sprinkle iron filings on a piece of paper. Create the two poles a magnetic field with a magnetic from underneath the paper. Identify the magnetic fields with a visual in your journal. Copyright © 2010 Ryan P. Murphy
Demonstration – Iron filings over a magnetic field Sprinkle iron filings on a piece of paper. Create the two poles a magnetic field with a magnetic from underneath the paper. Identify the magnetic fields with a visual in your journal. Copyright © 2010 Ryan P. Murphy
Demonstration – Iron filings over a magnetic field. Answer to visual! Sprinkle iron filings on a piece of paper. Create the two poles a magnetic field with a magnetic from underneath the paper. Identify the magnetic fields with a visual in your journal. Copyright © 2010 Ryan P. Murphy
The term magnetism is derived from Magnesia, the name of a region in Asia Minor where lodestone, a naturally magnetic iron ore, was found in ancient times. Copyright © 2010 Ryan P. Murphy
Visit a magnetic field simulator. nets-and-electromagnets nets-and-electromagnets
Copyright © 2010 Ryan P. Murphy
Opposite charges attract. Copyright © 2010 Ryan P. Murphy
Opposite charges attract. Copyright © 2010 Ryan P. Murphy
The Same forces repel. Copyright © 2010 Ryan P. Murphy
The Same forces repel. Copyright © 2010 Ryan P. Murphy
Which one is right and which is wrong? Copyright © 2010 Ryan P. Murphy
Which one is right and which is wrong? Answer: They are both wrong. Copyright © 2010 Ryan P. Murphy
Which one is right and which is wrong? Answer: They are both wrong. Copyright © 2010 Ryan P. Murphy
Which one is right and which is wrong? Answer: They are both wrong. Copyright © 2010 Ryan P. Murphy
Which one is right and which is wrong? Answer: They are both wrong. Copyright © 2010 Ryan P. Murphy
Which one is right and which is wrong? Answer: They are both wrong. Copyright © 2010 Ryan P. Murphy
Which one is right and which is wrong? Answer: They are both wrong. Copyright © 2010 Ryan P. Murphy
Which one is right and which is wrong? Answer: Now they’re both right. Copyright © 2010 Ryan P. Murphy
Activity Simulation. Magnetic Field Hockey c-hockey c-hockey
Magnet: An object that is surrounded by a magnetic field and that has the property, either natural or induced, of attracting iron or steel.
Demonstration -Iron (Fe) is a very common magnet. Neodymium magnets are some of the strongest on Earth. Copyright © 2010 Ryan P. Murphy
Ferrofluids Video Link! (Optional) ature=related ature=related
The spinning inner cores of solid and liquid Iron creates a giant electromagnetic field. Copyright © 2010 Ryan P. Murphy
The EM field creates a kind of force field against charged particles from hitting Earth. Copyright © 2010 Ryan P. Murphy
The EM field creates a kind of force field against charged particles from hitting Earth. Copyright © 2010 Ryan P. Murphy
The EM field creates a kind of force field against charged particles from hitting Earth. Copyright © 2010 Ryan P. Murphy
The EM field creates a kind of force field against charged particles from hitting Earth. Copyright © 2010 Ryan P. Murphy
The EM field creates a kind of force field against charged particles from hitting Earth. Copyright © 2010 Ryan P. Murphy
This would be our Earth without the protective electromagnetic field created by our spinning core. Copyright © 2010 Ryan P. Murphy
Activity! Drawing the earth’s EM Field.
EM Field refers to Electromagnetic
Activity! Drawing the earth’s EM Field. EM Field refers to Electromagnetic
Activity! Drawing the earth’s EM Field. Pass out a paper plate to everyone. Draw a Earth about the size of a golf ball in the center. Spread iron filings all around the plate.
Activity! Drawing the earth’s EM Field. Spread iron filings all around the plate. From below, place a magnet beneath the earth and record the magnetic field that is created.
Activity! Drawing the earth’s EM Field. Spread iron filings all around the plate. From below, place a magnet beneath the earth and record the magnetic field that is created. Sketch the magnetic field / directions of the iron filings.
Activity! Drawing the earth’s EM Field. Spread iron filings all around the plate. From below, place a magnet beneath the earth and record the magnetic field that is created. Sketch the magnetic field / directions of the iron filings.
Activity! Drawing the earth’s EM Field. Spread iron filings all around the plate. From below, place a magnet beneath the earth and record the magnetic field that is created. Sketch the magnetic field / directions of the iron filings.
Activity! Drawing the earth’s EM Field. Spread iron filings all around the plate. From below, place a magnet beneath the earth and record the magnetic field that is created. Sketch the magnetic field / directions of the iron filings. Copy your sketch and label as the EM Field
Electromagnetic field protects the earth from charged particles. It also creates the Aurora borealis (Northern Lights)
Earths EM field. Learn more: magnetism/magnetism.html magnetism/magnetism.html
Video Link. Aurora borealis It needs music
Most of the atmosphere that use to be on Mars, as well as the abundance of liquid water is now gone because of the planets weakened EM field.
Solar winds blew them away.
Compass: A navigational instrument for determining direction relative to the earth's magnetic poles.
The magnetic poles of the earth have shifted throughout Earth’s history.
Magnetism. Learn More for-champions.com/science/magnetism.htmhttp:// for-champions.com/science/magnetism.htm
How to hold the compass and your posture is very important to get correct bearings. Copyright © 2010 Ryan P. Murphy
Activity! Learning to use a compass. Put “Red Fred in the shed” Put “Black Jack in the shack” Copyright © 2010 Ryan P. Murphy
Activity! Learning to use a compass. Put “Red Fred in the shed” Put “Black Jack in the shack” Copyright © 2010 Ryan P. Murphy
Activity! Learning to use a compass. Put “Red Fred in the shed” Put “Black Jack in the shack” Copyright © 2010 Ryan P. Murphy Red Fred
Activity! Learning to use a compass. Put “Red Fred in the shed” Copyright © 2010 Ryan P. Murphy Red Fred Shed
Activity! Learning to use a compass. Put “Red Fred in the shed” Copyright © 2010 Ryan P. Murphy Red Fred Shed
Activity! Learning to use a compass. Put “Red Fred in the shed” Put “Black Jack in the shack” Copyright © 2010 Ryan P. Murphy Shed
Copyright © 2010 Ryan P. Murphy Shed
Copyright © 2010 Ryan P. Murphy Shed
Video Link! Using a Compass Copyright © 2010 Ryan P. Murphy Shed
Going outside to use the compass. Find 0 degrees / North (hold and face) Mark ground at feet with object. Turn dial to 120 degrees, (Put Red Fred in the shed.) Face and sight a target, take 30 steps keeping red Fred in shed. Follow the red arrow when Red Fred is in the shed. Turn dial to 240 degrees (Put Red Fred in the shed) Face and sight a target, take 30 steps keeping red Fred in shed. Turn dial to 360 degrees / North (Red Fred It) Face and sight a target, take 30 steps keeping red Fred in shed. How close were you? Copyright © 2010 Ryan P. Murphy
Activity! (Optional) Participate in an Orienteering Course or create your own. Copyright © 2010 Ryan P. Murphy “Do you see the Owl?”
Activity! (Optional) Participate in an Orienteering Course or create your own. Copyright © 2010 Ryan P. Murphy “Yah,” “He’s that way.”
Faraday's Law: The changing of a magnetic field can create voltage. Copyright © 2010 Ryan P. Murphy
Faraday's Law: The changing of a magnetic field can create voltage. Copyright © 2010 Ryan P. Murphy
Electrical motors and generators use this law. Magnets and Electricity Copyright © 2010 Ryan P. Murphy
Electrical motors and generators use this law. Magnets and Electricity Copyright © 2010 Ryan P. Murphy
Electrical motors and generators use this law. Magnets and Electricity How many products can we mention? Copyright © 2010 Ryan P. Murphy
Activity Simulator. Faraday’s Law and introduction to electromagnets.
An electric motor uses the attraction and repelling properties of magnets to create motion.
Electric motors use a permanent magnet and temporary magnet.
The permanent magnetic has a north and south Pole.
Electric motors use a permanent magnet and temporary magnet. The permanent magnetic has a north and south Pole. The temporary magnet is a special magnet called an electromagnet. It is created by passing an electric current through a wire.
The motor works by passing an electric current through a wire.
The permanent magnet has a magnetic field (north pole and south pole) all of the time.
The motor works by passing an electric current through a wire. The permanent magnet has a magnetic field (north pole and south pole) all of the time.
The motor works by passing an electric current through a wire. The permanent magnet has a magnetic field (north pole and south pole) all of the time. The electromagnet only has a magnetic field when current is flowing through the wire.
The motor works by passing an electric current through a wire. The permanent magnet has a magnetic field (north pole and south pole) all of the time. The electromagnet only has a magnetic field when current is flowing through the wire.
The strength of the electromagnet's magnetic field can be increased by increasing the current through the wire, or by forming the wire into multiple loops.
When the battery is not connected, the temporary magnet (loop / electromagnet) sits in the magnetic field of the permanent magnet.
When you connect the battery the temporary magnetic field interacts with the permanent magnetic field.
When the battery is not connected, the temporary magnet (loop / electromagnet) sits in the magnetic field of the permanent magnet. When you connect the battery the temporary magnetic field interacts with the permanent magnetic field. Attracting and repelling forces created.
When the battery is not connected, the temporary magnet (loop / electromagnet) sits in the magnetic field of the permanent magnet. When you connect the battery the temporary magnetic field interacts with the permanent magnetic field. Attracting and repelling forces created. These forces push the temporary magnet (loop) which can spin freely.
Video Link and Directions. How to make a simple electric motor UcR2k UcR2k
Activity! Building a small electric engine. A.) Coil the wire around the D battery many times. Remove the coil and wrap the ends around two sides of the coil to hold it in place. Leave 4 inches of wire on each end.
Activity! Building a small electric engine. B.) Strip the TOP of both ends of the wire coil leads.
Activity! Building a small electric engine. B.) Strip both ends of the wire coil leads. Hold the coil vertically and coat one half of one lead with a permanent marker. Apply a second coat of ink a few minutes later.
Activity! Building a small electric engine. C.) Turn plastic cup upside down and place magnets to the top and bottom of cup.
Activity! Building a small electric engine. D.) Straighten the outside ends of both paper clips to form a “P.” Attach the paper clips to the cup using several rubber bands.
Activity! Building a small electric engine. E.) Balance the coil in the paper clip loop. Adjust the height so the coil is very close to the magnets when it spins.
Activity! Building a small electric engine. F.) Attach an cable clips to each paper clip just above the rubber band.
Activity! Building a small electric engine. G.) Connect the D-cell battery to the coil with clips. Give the coil a gentle spin.
Activity! Building a small electric engine. H.) Make adjustments, modifications and anything else to make it work.
Another version of the motor. Neodymium Magnet
Okay, So how does it work? Which one is correct? A.) The magnetic force from the battery combined with the hoop spins the ring counter clockwise. B.) The hoop creates a Faraday cage and the extra electrons spin the hoop counter clockwise. C.) Charges moving through a magnetic field experience a push dependent upon the direction of the magnetic field. D.) The earth’s magnetic field is turned on when you connect the battery and spins Northward. E.) Electrons get excited when they go around the copper wire loops. This excited state spins the loop against the electron gradient.
Okay, So how does it work? Which one is correct? And the answer is… A.) The magnetic force from the battery combined with the hoop spins the ring counter clockwise. B.) The hoop creates a Faraday cage and the extra electrons spin the hoop counter clockwise. C.) Charges moving through a magnetic field experience a push dependent upon the direction of the magnetic field. D.) The earth’s magnetic field is turned on when you connect the battery and spins Northward. E.) Electrons get excited when they go around the copper wire loops. This excited state spins the loop against the electron gradient.
Okay, So how does it work? Which one is correct? And the answer is… A.) The magnetic force from the battery combined with the hoop spins the ring counter clockwise. B.) The hoop creates a Faraday cage and the extra electrons spin the hoop counter clockwise. C.) Charges moving through a magnetic field experience a push dependent upon the direction of the magnetic field. D.) The earth’s magnetic field is turned on when you connect the battery and spins Northward. E.) Electrons get excited when they go around the copper wire loops. This excited state spins the loop against the electron gradient.
Answer: It works on the principal of Faraday's Law of electromagnetic induction. This force depends on the direction of the magnetic field. Because the wire is stripped on one side, it alternates the current from on to off every 1/2 rotation. Halfway through the spin, the ring gets current and receives a boost.
Answer: It works on the principal of Faraday's Law of electromagnetic induction. A current- carrying conductor generates a magnetic field; when this is placed in between the poles of a strong magnet, it generates rotational motion. This force depends on the direction of the magnetic field. Because the wire is stripped on one side, it alternates the current from on to off every 1/2 rotation. Halfway through the spin, the ring gets current and receives a boost.
Answer: It works on the principal of Faraday's Law of electromagnetic induction. A current- carrying conductor generates a magnetic field; when this is placed in between the poles of a strong magnet, it generates rotational motion. This force depends on the direction of the magnetic field. Because the wire is stripped on one side, it alternates the current from on to off every 1/2 rotation. Halfway through the spin, the ring gets current and receives a boost.
Answer: It works on the principal of Faraday's Law of electromagnetic induction. A current- carrying conductor generates a magnetic field; when this is placed in between the poles of a strong magnet, it generates rotational motion. This force depends on the direction of the magnetic field. Because the wire is stripped on one side, it alternates the current from on to off every 1/2 rotation. Halfway through the spin, the ring gets current and receives a boost.
Electromagnets: By running electric current through a wire, you can create a magnetic field. Copyright © 2010 Ryan P. Murphy
Electromagnets: By running electric current through a wire, you can create a magnetic field. Copyright © 2010 Ryan P. Murphy
The advantage of an electromagnet is that you can turn it on and off. Copyright © 2010 Ryan P. Murphy
We created an electromagnet when we created our electric motor.
Please record this spreadsheet. Size of batteryNumber of paper clips collected AATrial___________ Trial___________ Trial______________ D
Activity – Building an electromagnet Draw the finished product. How many paper clips can it pick up with AA and then D battery? Why? Practice turning on / off with the magnet by transporting paperclips to the empty cup. Copyright © 2010 Ryan P. Murphy Electromagnets. Learn more.
Video Link! Electricity Review kCkX4 kCkX4
Be the first to figure out the hidden picture beneath the boxes. Raise your hand when you think you know, you only get one guess. Copyright © 2010 Ryan P. Murphy
Electricity and Magnetism Review Game Copyright © 2010 Ryan P. Murphy