Magnet A can hold three steel paperclips; Magnet B can hold five. Which is the strongest?
Magnet A
Magnet B
They are both equally strong
None of these
When two magnets repel each other, they:
Push away from each other
Pull towards each other
Neither push nor pull
Which of these metals are attracted to a magnet?
Iron
Nickel
Cobalt
All of these
Are all metals magnetic?
Yes, all metals are magnetic
No, no metals are magnetic
No, only a few such as iron and steel
Which of these devices uses a magnet or electromagnet to make it work?
All of these devices use a magnet or electromagnet.
A compact disc
A microchip
An electric bell
What advantage does an electromagnet have over a permanent magnet?
A permanent magnet cannot be used to pick up nickel.
An electromagnet can be used for picking up more metals.
An electromagnet can be switched off.
An electromagnet is lighter.
If I bring a North and South Pole together which word or phrase best describes what happens?
Attraction
Reaction
Repulsion
Brownian motion
When you squash a spring down with your hand, you feel:
An upward push on your hand
A downward push on your hand
No push or pull at all
How can an electromagnet be made stronger?
Add an iron core.
Increase the voltage.
Add more coils of wire.
When talking about magnets, what word is the opposite of attract?
Compass
Gravity
Rebel
Repel
