Electricity and Magnetism - Assessment

A scientist is investigating with two types of magnets. The table shows the results of the investigation. Which of the following arguments is supported by the data in the table?

• Permanent magnets can be turned on and off, while electromagnets are always producing magnetic fields.

• Electromagnets can be turned on and off, while permanent magnets are always producing magnetic fields.

• Electromagnets are always stronger and larger than permanent magnets.

• Permanent magnets are always stronger and larger than electromagnets.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Riley is investigating with a small magnet and a magnetic board. She places small squares of 1 mm thick paper in between the magnetic board and the magnet. The picture shows her set up. The table shows her observations.

What is Riley's investigation most likely designed to show?

• The size of the magnet can affect the strength of the magnetic force between magnetic objects.

• The shape of the magnet can affect the strength of the magnetic force between magnetic objects.

• The type of material placed between magnetic objects can affect the strength of the magnetic force.

• The thickness of material placed between magnetic objects can affect the strength of the magnetic force.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Unlike an electromagnet, a permanent magnet

• does not need electricity to work.

• cannot lift heavy objects and release them.

• can easily increase or decrease its magnetic field.

• can shut down its magnetic field with the flip of a switch.

The strongest part of the magnetic field from a magnet is found at the

• farthest region from the magnet.

• center of the magnet.

• magnet’s domains.

• magnet’s poles.

Which of the following will most likely happen when a person tests the strength of an electromagnet by increasing the number of times he or she wraps a wire in coils around a metal nail?

• The number of metal coils will have no effect on the magnetic field of the electromagnet.

• The magnetic field of electromagnet will increase and then decrease as the number of coils increases.

• The electromagnet will be able to pick up more metal tacks as the number of coils increases.

• The electromagnet will pick fewer metal tacks as the number of coils increases.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Kim is using an electric current to produce a magnetic field. What will happen when she turns off the current?

• The strength of the magnetic field will increase.

• The poles of the magnetic field will reverse.

• The magnetic field will disappear.

• The strength of the magnetic field will decrease.

Tags

NGSS.HS-PS2-5

What will most likely have to happen for the crane to drop the car?

• A bar magnet will have to be placed underneath the car to cancel the magnetic force.

• The driver will have to place a non-metal object between the magnet and the car.

• The driver will have to heat the magnet to the point where it no longer has a magnetic force.

• The electric current that is creating the magnetic force will have to be turned off.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-3

NGSS.MS-PS2-5

A student is investigating with magnets. The student's setup is shown. Use the information to answer the questions that follow. Step 1: Place ten iron marbles on a 5-millimeter (mm) paper plate. Step 2: Move a bar magnet around underneath the plate and observe if the marbles move around. Step 3: Place ten iron marbles on a 5-mm glass plate. Step 4: Repeat Step 2. Step 5: Place ten iron marbles on a 5-mm wooden plate. Step 6: Repeat Step 2. What is the most likely outcome of the student’s investigation?

• The iron marbles will move around on all of the plates because the magnetic field of the magnet will pass through all of the materials.

• Only on the paper plate will the iron marbles move around because paper is the only material that will allow a magnetic field to pass.

• The iron marbles will not move around on any of the plates because the magnetic field of the magnet will be stopped by the materials.

• Only on the wooden plate will the iron marbles not move around because wood is the only material that will not allow a magnetic field to pass.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

A student is investigating with magnets. The student's setup is shown. Use the information to answer the questions that follow. Step 1: Place ten iron marbles on a 5-millimeter (mm) paper plate. Step 2: Move a bar magnet around underneath the plate and observe if the marbles move around. Step 3: Place ten iron marbles on a 5-mm glass plate. Step 4: Repeat Step 2. Step 5: Place ten iron marbles on a 5-mm wooden plate. Step 6: Repeat Step 2. 9. Which statement best describes what would happen if the student used a metal plate for her investigation?

• The marbles would not move because the metal plate would destroy the magnetic field of the magnet.

• The marbles would not move because the metal plate would redirect the magnetic field of the magnet.

• The marbles would move quickly because the metal plate would increase the strength of the magnetic field of the magnet.

• The marbles would move slowly because the metal plate would decrease the strength of the magnetic field of the magnet.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-3

NGSS.MS-PS2-5

A student performs an investigation. She places a magnet next to a paper clip and watches it quickly become attracted. Next, she moves the magnet farther away, and the paper clip takes a little longer to become attracted. Then, she moves the magnet even farther away from the paper clip. The paper clip does not move.

What is the student controlling in this investigation?

• the size of the magnet

• the poles of the magnet

• the direction of the magnetism

• the strength of the magnetic field

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5