Magnetism and Electromagnetism

Surrounding every magnet is a(n) __________  __________.

• magnetic field
• electrical current
• smaller magnet
• funny saying

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

• magnetism

• magnetic current

• magnetic field

• electric current

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.

When magnetic field lines are drawn, how do they look?

• straight lines
• criss-crossed lines like X's
• curved lines from N to S pole and outwards
• lines extending outward in all directions like drawing the Sun

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

• increases

• decreases

• stays the same

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.

When a magnetic South pole is brought close to a magnetic North pole, the magnets will

• attract
• repel
• create sparks
• cancel each other out

The relationship between electricity and magnetism is called

• electrical energy.
• induced current.
• electromagnetism.
• ferromagnetism.

What happens to the strength of a magnetic field as you move away from the magnet?

• The strength of the magnetic field increases.

• The strength of the magnetic field doesn't change.

• The strength of the magnetic field is doubled.

• The strength of the magnetic field decreases.

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.