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Other Sciences
6th -
8thgrade
Electromagnets, Generators and Motors
30 questions
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- 1. Multiple ChoiceWhat is the transfer of electricity in a motor?chemical to mechanicalelectrical to mechanicalmechanical to electricalphysical to potential
- 2. Multiple ChoiceWhat is the transfer of electricity in a generator?Mechanical to ElectricalPhysical to PotentialElectrical to MechanicalYogurt to Light
- 3. Multiple ChoiceWhat can you use to make an electromagnet?Battery, nail and stringBattery, pencil and wireWire, battery and iron ore (nail)Peanut butter, lampshade, hand sanitizer
- 4. Multiple ChoiceIn large generators in power plants, ___________ rotate inside a coil of wire to produce an electric current.WindWaterMagnetsCircuits
- 5. Multiple ChoiceWhich device uses mechanical energy to produce electrical energy?Electric MotorMagnetGeneratorSolar Cell
- 6. Multiple ChoiceElectric fields are often associated with what other kind of field?Magnetic FieldsNuclear FieldsParticle FieldsCorn Fields
- 7. Multiple ChoiceWhat device is made of coils of wire with an electrical current passing through it in order to generate a magnetic field?ElectromagnetGeneratorElectron MagnetMotor
- 8. Multiple ChoiceWhat force does a magnetic field apply without actually touching the object?a push or pullgravityfrictionpressure
- 9. Multiple ChoiceWhat two forces are required for generators and electric motors to work?magnetism and thermalelectricity and thermalelectricity and magnetismmagnetism and radiant
- 10. Multiple ChoiceWhat is the fan that turns the magnet inside a generator called?electromagnetturbinesolar panelpinstock
- 11. Multiple ChoiceWhat energy do you put IN to a generator?MechanicalElectricalThermalPotential
- 12. Multiple ChoiceWhat type of energy comes OUT of a generator?MechanicalElectricalThermalPotential
- 13. Multiple ChoiceWhat happens to the strength of an electromagnet as you add more coils around it?IncreasesDecreasesStays the sameStops completely
- 14. Multiple ChoiceIn an electric motor, the energy transformation begins as ----electrical and becomes chemicalmechanical and becomes electricalelectrical and becomes mechanicalmechanical and becomes chemical
- 15. Multiple ChoiceWhat is the device seen here?generatorelectric motorelectromagnetmagnet
- 16. Multiple ChoiceWhich of the following is NOT part of an electromagnet?WireIronToothpickPower source
- 17. Multiple ChoiceWhen two magnets attract, they ______________push apartchange colorget colderpull together
- 18. Multiple ChoiceThis 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.
- 19. Multiple ChoiceSurrounding every magnet is a __________ __________.magnetic fieldelectrical currentanother magnetan enemy
- 20. 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:attractrepelneitherflip
- 21. 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:attractrepelneitherflip
- 22. 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, wireexcited, hair, apple
- 23. Multiple ChoiceWhile electric current is flowing through a wire, what surrounds the wire?a magnetic fielda glowing lightneutronsprotons
- 24. Multiple ChoiceWhat is the flow of electrical charges called?VoltageResistanceCurrent/electricityCircuit
- 25. Multiple ChoiceElectricity is the flow of _________.ProtonsNeutronsElectrons
- 26. Multiple ChoiceWhich subatomic particle has a negative charge?ProtonNeutronElectronEnlighton
- 27. Multiple ChoiceWhat will happen when these magnets are brought close together?They will attract each other.They will repel each other.Both magnets will turn to the leftBoth magnets will turn to the right
- 28. Multiple ChoiceWhat does a motor do?Moves up and downRotates without electricityIt doesUses electricity to rotate
- 29. Multiple ChoiceWhat is most likely to happen when the switch is closed?A magnetic field should be producedThe nail will rustThe battery will explodeThe wire will catch on fire
- 30. 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
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