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- 1. Multiple ChoiceWhich of the following is NOT part of an electromagnet?WireIronToothpickPower source
- 2. Multiple Choice
This is a picture of a simple electromagnet. How can the electromagnet be made stronger?Add more coils of wire to the nail.Use a smaller battery.Reverse the poles of the magnet.Remove all the coils and the nail. - 3. Multiple ChoiceWhich of the following is shown in the picture?ElectromagnetElectric generatorElectric motorTransformer
- 4. Multiple ChoiceHow do you make an electromagnet stronger?Add a motor and/or lightbulbsAdd more light bulbs and/or wire coilsadd more wire coils and/or a switchadd more wire coils and/or batteries
- 5. Multiple ChoiceHow are electromagnets different from magnets?magnets can be turned on/offyou can turn an electromagnet on/offmagnets are more powerfulmagnets have a North and South pole
- 6. Multiple ChoiceWhat happens if you cut a bar magnet in half?You get two North pole magnetsYou get two South pole magnetsYou get a North pole magnet and a South pole magnetYou get two smaller magnets, each with a North and South pole
- 7. Multiple ChoiceWhat is magnetism?Energy created by magnetsA force created by magnetsA contact forceAn invisible force that attracts electrically charged particles
- 8. Multiple ChoiceWhat are the ends of a magnet called?East and west polesLeft and Right endsNorth and South endsNorth and South poles
- 9. Multiple ChoiceWhat is the name of the force that attracts or repels materials?currentelectricitymagnetism
- 10. Multiple ChoiceSurrounding every magnet is a __________ __________.magnetic fieldelectrical currentanother magnet
- 11. Multiple ChoiceAll of the following can be picked up by a magnet EXCEPT:aluminumcobaltnickeliron
- 12. Multiple ChoiceIf I were to try to connect the North pole of one magnet to the North pole of another magnet, the two poles would:attractrepelneither
- 13. Multiple ChoiceIf I were to try to connect the North pole of one magnet to the South pole of another magnet, the two poles would:attractrepelneither
- 14. Multiple ChoiceIf I split a magnet in half, I end up with only a North pole on one magnet and a South pole of the other.TrueFalse
- 15. Multiple ChoiceIn order for an electromagnet to be formed, an __________ current must pass through a coil of __________ wrapped around an ________ core.wire, iron, electricelectric, wire, ironiron, electric, wire
- 16. Multiple ChoiceWhat kind of magnet can be turned on and off?refridgerator magnetelectromagnetmagnetiteiron
- 17. Multiple ChoiceWhat happens when a wire is wound into a coil around an iron core in an electromagnet?the wire exolodesyou get electricutedthe magnetic field becomes strongerthe magnetic field becomes weaker
- 18. Multiple ChoiceWhile electric current is flowing through a wire, what surrounds the wire?a magnetic fielda glowing lightneutronsprotons
- 19. Multiple ChoiceWhen two magnets attract, they ______________push apartchange colorget colderpull together
- 20. Multiple ChoiceWhen two magnets repel, they ________________change colorpull togetherpush apartget colder
- 21. Multiple ChoiceOpposite magnetic forces _____ each other.AttractRepel
- 22. Multiple ChoiceWhat would we call a nail that can pick up a paperclip because it is touching a magnet?temporary magnetpolesforcedetector
- 23. Multiple ChoiceA north pole and a south pole will attract.TrueFalse
- 24. Multiple ChoiceIn order to make an electromagnet, you need abattery, nail, and magnetbattery, wire, and nailmagnet, nail, and wireall of the above
- 25. Multiple ChoiceWhere is the force of attraction the strongest on a magnet?at the polesin the middleabove the magnetbelow the magnet
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