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- 1. Multiple Choice
What type of magnet that can turned on and off?
electromagnet
permanent magnet
electricity
battery
- 2. Multiple Choice
Magnets on refrigerator cannot be turned off. Which type of magnets they belong?
electromagnets
battery
permanent magnets
copper wire
- 3. Multiple Choice
Why doe the compass needle move when the electricity flows through the coiled wire?
Because a magnetic field is not produced, which do not attract to the needle.
Because a magnetic field is produced, which attracts the compass needle.
Because the battery produced magnetic field.
- 4. Multiple Choice
What are the components of the electromagnets?
battery, wire and bulb
battery , copper wire and paper clips
battery, copper wire and iron nail
battery, wire and aluminum
- 5. Multiple Choice
What is the role of the battery in the electromagnet?
It provides light energy for the electromagnet.
It provides magnetic field for the electromagnet.
It provides sound energy for the electromagnet.
It provides the power source for the electromagnet.
- 6. Multiple Choice
How can we control an electromagnet?
By turning the electricity on and off.
By turning the kinetic energy on and off.
- 7. Multiple Choice
What would happen if you took one end of the wire off the battery?
The nail will be a magnet.
The nail would no longer be a magnet
Nothing will happened.
The nail will heats up.
- 8. Multiple Choice
Which part of the electromagnets turned into a magnet when electricity flows through a coiled wire?
Battery
Copper wire
Iron Nail
Bulb
- 9. Multiple Choice
Which part of the electromagnet produces a magnetic field?
Battery
Coiled copper wire
Bulb
Iron nail
- 10. Multiple Choice
Which steps will you take to build an electromagnet?
First, wrap the wire around a nail. Next, attach the ends of the wire to a battery to make an electric circuit.
First, attach the ends of the wire to a battery to make an electric circuit. Next wrap the wire around a nail.
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