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- 1. Multiple ChoiceWhat does attract mean?to pull apartto jumpto come togetherto shop
- 2. Multiple ChoiceWhere is the force of attraction the strongest on a magnet?at the polesin the middleabove the magnetbelow the magnet
- 3. Multiple ChoiceWhat happens when two bar magnets repel each other?The poles of the magnets pull toward each other.The poles of the magnets push away from each other.The centers of the magnets pull toward each other.The centers o the magnets push away from each other.
- 4. Multiple Choice
What 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 - 5. 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
- 6. Multiple Choice
What kind of magnet can be turned on and off?
refridgerator magnet
electromagnet
magnetite
iron
- 7. Multiple ChoiceWhat happens when a wire is wound into a coil around an iron core in an electromagnet?the wire exolodesyou get electrocutedthe magnetic field becomes strongerthe magnetic field becomes weaker
- 8. Multiple ChoiceWhile electric current is flowing through a wire, what surrounds the wire?a magnetic fielda glowing lightneutronsprotons
- 9. Multiple ChoiceHow do you make an electromagnet?wrap a battery in wire and connect it to an iron nail.wrap a wire with another wire and connect it to an iron nail.wrap an iron nail in wire and connect it to a power source.wrap an iron nail in wire and connect it to another iron nail.
- 10. Multiple Choice
How were we able to turn the electromagnet off?
Hooking the wire up to the battery/
Moving the battery further away from metal objects
Disconnecting the circuit to stop current flow
- 11. Multiple ChoiceGenerators are devices that convert _____ energy into _____ energy.chemical; mechanicalmechanical; electricalelectrical; mechanicalpotential; kinetic
- 12. Multiple ChoiceIn large generators in power plants, ___________ rotate inside a coil of wire to produce an electric current.WindWaterMagnetsCircuits
- 13. Multiple ChoiceWhich device uses mechanical energy to produce electrical energy?Electric MotorMagnetGeneratorSolar Cell
- 14. Multiple ChoiceWhat energy do you put IN to a generator?MechanicalElectricalThermalPotential
- 15. Multiple ChoiceWhat type of energy comes OUT of a generator?MechanicalElectricalThermalPotential
- 16. Multiple ChoiceWhat happens to the strength of an electromagnet as you add more coils around it?IncreasesDecreasesStays the sameStops completely
- 17. Multiple ChoiceWhat is created when a wire moves between the poles of a magnet?A. a ferromagnetB. a solenoidC. an electromagnetD. an electric current
- 18. Multiple ChoiceA compass needle responds to a magnetic field, because the compass needle is aA. generator.B. motor.C. magnet.D. transformer.
- 19. Multiple ChoiceAccording to the Right Hand Rule, where is the magnetic field generated around a current-carrying wire?Perpendicular to the wireParallel to the wire
- 20. Multiple ChoiceFaraday demonstrated that an electric current can be created by...Having a magnet near byMoving a magnet near a wireHooking a wire up to a batteryRunning a generator
- 21. Multiple ChoiceA device that increases or decreases the voltage of alternating currentA. magnetB. magnetic poleC. transformerD. magnetic force
- 22. Multiple ChoiceA coil of wire with an electric current in it is called a(n)A. transformer.B. electric generator.C. electric motor.D. solenoid.
- 23. Multiple ChoiceWhat can demagnetize a magnet?A. high altitudesB. high temperaturesC. low altitudesD. low temperatures
- 24. Multiple ChoiceWhat can you make visible by sprinkling iron filings around a magnet?A. the areas called domainsB. the magnetic forcesC. the north and south polesD. the magnetic field lines
- 25. Multiple ChoiceWhat is the flow of electricity?electric motorElectric currentElectric eelelectric circuit
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