Magnetism Basics

If two magnetic north poles were brought together, what would happen?
1. They would repel each other, moving away.
2. They would attract each other, moving together.
3. They would feel nothing and not move.
If a magnetic north pole and a magnetic south pole were brought together, what would happen?
1. They would repel each other, moving away.
2. They would attract each other, moving together.
3. They would feel nothing and not move.
If the top two magnets are attracted to one another, what is 2?
1. North pole
2. South pole
3. Not enough information given
Looking at the picture, if the nail is attracted to the magnet, where are the nail's north and south pole?
1. A is north; B is south
2. A is north; B is also north.
3. B is north; A is south
4. They are both south poles.
If the three magnets are all attracted to one another, what is side 4?
1. A north pole
2. A south pole
If the three magnets are repelling each other, what is side 3?
1. A north pole
2. A south pole
The part of a compass that points north is a north pole. So what is the earth's magnetic north pole?
1. A north pole
2. A south pole
Which of the following is not a property of magnets?
1. They attract other magnets
2. Opposite poles attract
3. They attract all metals
4. Like poles repel
Magnets that do not lose their magnetism are called:
1. Magnetrons
2. Permanent magnets
3. Temporary magnets
4. Horseshoe magnets
This is an example of a:
1. Simple electromagnet
2. Permanent magnet
3. Electricity magnet
4. Nail magnet
Which of the following makes a magnetic field (and, therefore, a magnet)?
1. Electricity in loops or circles.
2. Electricity in straight lines.
3. Electricity stored in batteries.
4. Potential energy which can make electricity.
Why are magnets magnetic?
1. In permanent magnets the electrons spin in the same direction. These make little electromagnets, which add up to make a magnet field.
2. The protons in the nucleus of permanent magnets have more strong nuclear force, which can attract other atoms. This attraction is the magnetic field.
3. Permanent magnets have extra electrons which attract the protons in other atoms. And since opposites attract, this is the magnetic field.
4. The electrons in permanent magnets are moving faster, which gives them an acceleration. Since F=ma, more electron acceleration makes more magnetic force.
What allows a permanent magnet to make a piece of metal a temporary magnet?
1. The permanent magnet's field causes the metal's electrons to start spinning in the same direction. These add up as little electromagnets, making a large magnet.
2. By the Law of Conservation of Energy the magnetic energy of the permanent magnet is transfered to the metal, making it a magnet.
3. By touching a magnet, the metal's protons begin to move quickly enough to give off some of its strong nuclear force.
4. Some of the spinning electrons of the permanent magnet are transfered to the metal. These electrons are still magnetic, making the metal a magnet.
Which of the following is not a property of magnets?
1. Exert an electric field.
2. Exert a magnetic field
3. Attract most metals.
4. Attract other magnets
Which of the following is not a property of magnets?
1. Cannot have an unpaired pole (have to have both a N and S pole).
2. Can have an unpaired pole (can have a N pole without a S pole).
3. Have north and south poles
4. Like poles will repel each other.