Magnets
This is the strongest place on a magnet.
What are the poles?
This is what the needle on a compass will point towards if placed on top of a bar magnet.
What is the south pole?
This is produced by a flowing electric current.
What is a magnetic field?
Which would require more work? A man pulling a car or a man moving a box?
What is a man moving a car
This type of magnet best mimics the Earth's magnetic field.
What is a bar magnet?
This is the weakest point on a magnet.
What is the middle?
This is why a bar magnet placed close to a compass can change the needle's direction.
What is the magnet is stronger/closer than the Earth's magnetic field.
Adding more coils, a bigger magnet, or more ferromagnetic material will do this to an electromagnet.
What is strengthening the magnet?
What is the equation to calculate work?
Work done (J) = Force (N) x Distance (m)
This is the magnetic pole at the Earth's geographic south pole.
What is the magnetic north pole?
All magnets have this many poles.
What are 2 poles.
This is a region in which the magnetic fields of atoms are grouped together and aligned (going in the same direction).
What is a magnetic domain?
These are three advantages of an electromagnet over a permanent magnet.
What are the ability to turn it off, make it stronger, and change polarity ?
What type of heat transfer is picked up by infrared goggles?
Bonus - what does red and blue mean when viewing in IR?
Radiation
Blue means cool, Red means hot
This is where the Earth's magnetic field points to.
What are the poles.
How can you turn a ferromagnetic (made of iron, cobalt, nickel) material into a magnet?
What is rubbing it against a stronger magnet?
These lines go from north to south.
What are magnetic field lines?
Where on Earth is the South Pole of Earth's magnet located?
What is it is located in the Northern Hemisphere.
Explain why it is better to insulate the roof of your house or windows before anywhere else to keep heat in?
Because hot air rises, so insulating the roof and windows (where most of the heat escapes) would be best.
Explain why it would be better to use an electromagnet for a specific job compared to a permanent magnet?
What is an electromagnet can be turned off and you can increase its strength by changing the strength of the current.
This is the invisible field around a magnet that will attract or repel other similar fields or ferromagnetic material.
What is a magnetic field?
This is what an electric current will do to a magnetic domain.
What is lining them up and creating a magnet.
Explain in detail how an electric bell works.
What is, as an electric current passes through the circuit, it turns an electromagnet on. This attracts a metal plate with a gong that strikes a bell. As it strikes a bell, it breaks the circuit which turns the electromagnet off.
Describe the three methods of heat transfer and give an example of each.
Conduction- heat transfer in solids (heating a metal pipe for example)
Convection- heat transfer in fluids (boiling water for eg)
Radiation - heat transfer via waves (sun)
This is the Danish scientist who first discovered that electric currents create magnetic fields.
Who is Hans Christian Oersted?