Magnetism

What will happen when these magnets are brought close together?

• They will attract each other.
• They will repel each other.
• Both magnets will turn to the left
• Both magnets will turn to the right

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Iron, Nickel and cobalt are all __________________ materials

• Shiny
• poles
• magnetic
• cold

Which object would a magnet attract?

• a glass bottle
• a piece of paper
• a metal paper clip
  compass
• a rubber eraser
  magnetic field

True or False: All metals are attracted to magnet.

• True
• False

Tags

NGSS.MS-PS2-3

Which of the following is true about a bar magnet?

• Its magnetic field is strongest near its center.
• It is surrounded by a magnetic field.
• The north pole is stronger than the south pole.
• The south pole is stronger than the north pole.

Tags

NGSS.MS-PS2-3

How is an electromagnet different from a permanent magnet?

• An electromagnet is smaller and less powerful.
• An electromagnet's magnetism can be turned off.
• An electromagnet can be built without using metal.
• An electromagnet does not attract objects containing iron.

A simple electromagnet can be made with which of the following?

• an electric current
• a turbine and nail
• a nail, a wire, and a battery
• a compass and a battery

A coil that is magnetized only when an electric current flows through it is_______.

• a battery
• a generator
• a conductor
• an electromagnet

How can the strength of an electromagnet be increased?

• by rubbing it with a stronger magnet
• by increasing the coils of wire around the iron
• by increasing the length of the wire from the battery
• by loosening the coil of wire around the iron

The strongest part of a magnet is...

• the bars.
• the force field.
• the poles. 
• the middle.