Permanent and Temporary Magnets

Magnetism

Multiple Choice

What do similar poles do?

• Repel

• Attract

Multiple Choice

A north pole and a south pole will attract.

• True

• False

Multiple Choice

It is possible for a magnet to have only one pole.

• True

• False

Multiple Choice

What will happen when these magnets are brought close together? (image shows two magnets with the N end pointed towards each other)

• They will attract each other.

• They will repel each other.

• Both the magnets will turn to the left.

• Both the magnets will turn to the right.

Multiple Choice

Looking at the drawing. If you tried to move these 2 magnets closer together, what would you feel? (image shows two magnets with the N end pointed towards a S end)

• Push Away

• Pull Closer together

• No Force

• Let the Force be with YOU

Electromagnetism

An electrical current moving through a wire creates a magnetic field

Multiple Choice

Electric currents produce _____________

• electron clouds

• magnetic fields

• sound waves

Why do it?

Electromagnets are useful because they can easily be turned on and off and they can be made stronger or weaker as needed

Electromagnets are used in many different ways

• Cranes

• Levitating trains

• Electronic locks

• MRI machines

Multiple Choice

What type of magnet that can turned on and off?

• electromagnet

• permanent magnet

• electricity

• battery

Multiple Choice

Magnets on refrigerator cannot be turned off. Which type of magnets they belong?

• electromagnets

• battery

• permanent magnets

• copper wire

Multiple Choice

Moving electrical charge or current creates a

• dead zone for magnets

• magnetic field