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- 1. Multiple ChoiceWhat is created when a wire moves between the poles of a magnet?a ferromagneta solenoidan electromagnetan electric current
- 2. Multiple Choice
What kind of magnet can be turned on and off?refrigerator magnetelectromagnetmagnetiteiron - 3. Multiple ChoiceA device that converts mechanical energy into electrical energyelectric generatorelectric motorelectromagneticelectric generator
- 4. Multiple ChoiceWhat is the flow of electricity?electric motorElectric eelElectric currentelectric circuit
- 5. Multiple ChoiceWhat would increase the strength of an electromagnet?Increasing the amount of current flowing through the wire.Inserting a wooden core inside the coilChanging the direction of the currentDecreasing the number of coils of wire
- 6. Multiple ChoiceThe interaction between electricity and magnetismmagnetic forceelectromagnetismelectromagnetmagnetic pole
- 7. Multiple ChoiceWhy does a compass always point north?The needle is a magnet and it aligns itself with the Earth's magnetic fieldsEarth is a magnet and it attracts all metal objects towards the northEarth's south pole does not have a magnetic pullAll magnets have a north and south pole
- 8. Multiple ChoiceA device that converts electrical energy into mechanical energyA. electromagnetB. electromagnetic inductionC. electric motorD. electromagnetism
- 9. Multiple ChoiceWhat is an electromagnet?a magnet that creates an electric currenta device that createda magnet that createsa device that creates a magnet
- 10. Multiple ChoiceMagnetic Field lines....Go out of the N side and into the S sideGo out of the S side and into the N sideGo out of the N side AND out of the S sideGo into the N side AND go into the S side
- 11. Multiple ChoiceIf you wrap more coils around an electromagnet, it will become...brighterstrongerweakerinvisible
- 12. Multiple ChoiceA moving magnetic field causes current to flow is called...Electromagnetic InductionMagnetismNorth PoleGenerator
- 13. Multiple ChoiceA hydroelectric plant in Niagara Falls sends 3000 V to the transformer in a substation that steps it up to 120000 V for transmission to homes in New York City. If the primary coil contains 2000 turns, how many turns are there in the secondary coil of the step-up transformer?180000 turns8000 turns2000000 turns3600 turns
- 14. Multiple ChoiceWhich components do you need to build an electromagnet?a wire, a conductor, a battery and some paper clips.a wire, a compass, a battery and some paper clips.wool, a conductor, a battery and some paper clips.
- 15. Multiple ChoiceWhen a bar magnet is broken in half, what is the result?Two N polesTwo S polesTwo N poles and two S polesThe bar loses its magnetic properties
- 16. Multiple ChoiceA device that increases or decreases the voltage of alternating currentmagnetmagnetic poletransformermagnetic force
- 17. Multiple ChoiceHow do you magnetize something made of iron, cobalt, or nickel?Rub one end of the magnet in one direction to align the domains.Put the materials in extreme temperatures.Melt all of the materials togetherThese materials cannot be magnetized.
- 18. Multiple ChoiceAs an electron moves, it makes, or induces a(n)acceleration.ferromagnet.chemical reaction.magnetic field.
- 19. Multiple ChoiceThis material is hard to magnetize, but stays magnetizedtemporarypermanentferromagnetelectromagnet
- 20. Multiple ChoiceThe process of creating a current in a circuit by changing a magnetic fieldelectric generatorelectric motorelectromagnetic inductionmagnet
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