Electromagnetism

Particles with opposite charges ____________ and particles with same (or like) charges ____________.

• attract, repel

• repel, repel

• attract, attract

• repel, attract

Tags

NGSS.3-PS2-3

This is a picture of a simple electromagnet. How can the electromagnet be made stronger?

• Add more coils of wire to the nail.
• Use a smaller battery.
• Reverse the poles of the magnet.
• Remove all the coils and the nail.

Tags

NGSS.3-5-ETS1-2

NGSS.3-PS2-3

NGSS.3-PS2-4

What does this image show?

• Parallel circuit

• Series circuit

• Magnet

• Electromagnet

Tags

NGSS.3-PS2-4

NGSS.4-PS3-4

What happens when an electric current flows through a wire?

• The wire begins to spin.

• Nothing happens.

• A field of gravity is created around the wire.

• A magnetic field is created around the wire.

Tags

NGSS.3-PS2-3

NGSS.4-PS3-2

The area of magnetic force around a magnet is known as its ____________.

• magnetism

• magnetic current

• magnetic field

• electric current

Tags

NGSS.3-PS2-3

Increasing the number of coils in an electromagnet will _________ the power of the magnet.

• decrease

• increase

• not affect

Tags

NGSS.3-PS2-3

What type of core is best for electromagnets?

• Steel

• Iron

• Plastic

• Copper

Tags

NGSS.3-PS2-4

NGSS.5-PS1-3

As the strength of a magnetic field increases, the ability to attract metal objects ____________.

• increases

• decreases

• stays the same

Tags

NGSS.3-PS2-3

What conclusion can you draw from this graph?

• As current increases, magnetic strength decreases.

• As current increases, magnetic strength increases.

• As current decreases, magnetic strength increases.

• There is no relationship between current and magnetic strength.

Tags

NGSS.3-PS2-3

What is true about electricity and magnetic fields?

• Electricity is needed to create any magnet.
• Electricity always creates a magnetic field.
• Electricity is stronger than a magnetic field.
• Electricity prevents magnetic fields from occurring.

Tags

NGSS.3-PS2-3