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
When two magnets repel each other, they:
Push away from each other
Pull towards each other
Neither push nor pull
None 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
When two magnets attract each other, they:
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
The more you squash or compress a spring down with your hand:
The bigger the downward force on your hand
The smaller the upward force on your hand
The bigger the upward force on your hand
All of these
Which pole of a magnet in a compass points north?
Neutral pole
South Pole
North Pole
How can an electromagnet be made stronger?
Add an iron core.
Increase the voltage.
Add more coils of wire.
Which of these objects would be attracted to a magnet?
A leather purse
A steel key
A wooden ruler
Charcoal
Why will a magnet not attract pieces of paper?
Because paper is not magnetic
Because paper is not sticky
Because paper is not strong