Science 8 | Physics | Unit 13. Magnetism Making an electromagnet

Choose the correct answer.
Add more coils of wire to the nail.
Reverse the poles of the magnet.
Use a smaller battery.
Remove all the coils and the nail.
Giải thích

The correct answer
Add more coils of wire to the nail.
Reverse the poles of the magnet.
Use a smaller battery.
Remove all the coils and the nail.

1/1
Choose the correct answer.
In order for an electromagnet to be formed, an __________ current must pass through a coil of __________ wrapped around an ________ core.
wire, iron, electric
iron, electric, wire
All are wrong
electric, wire, iron

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The correct answer

electric, wire, iron
wire, iron, electric
iron, electric, wire
All are wrong

1/1
Choose the correct answer.
What type of materials are needed to create an electromagnet?
switch, source of electricity, compass
battery, light bulb, plastic straw
generator, iron core, switch
battery, coil of wire, iron core

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The correct answer

battery, coil of wire, iron core
battery, light bulb, plastic straw
generator, iron core, switch
switch, source of electricity, compass

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Choose the correct answer.

Add more coils of wire to the nail.
Use a smaller battery.
Remove all the coils and the nail.
Reverse the poles of the magnet.

Giải thích

The correct answer
Add more coils of wire to the nail.
Reverse the poles of the magnet.
Use a smaller battery.
Remove all the coils and the nail.

1/1
Choose the correct answer.
How are electromagnets different from magnets?
magnets are more powerful
magnets have a North and South pole
magnets can be turned on/off
you can turn an electromagnet on/off

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you can turn an electromagnet on/off
magnets can be turned on/off
magnets are more powerful
magnets have a North and South pole

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Choose the correct answer.
Which of the following is NOT part of an electromagnet?
Iron
Power source
Wire
Toothpick

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The correct answer

Toothpick
Wire
Power source
Iron

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