Ch. 8 Physical Science

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bogera
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59813
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Ch. 8 Physical Science
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2011-01-17 21:05:31
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Physical Science
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Ch. 8 Physical Science
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  1. The properties and interactions of magnets

    A. magetism
    B. magnetic poles
    C. magnetic field
    magnetism
  2. Area around a magnet that exerts a force on other magnes and objects made of magnetic materials

    A. magetism
    B. magnetic poles
    C. magnetic field
    magnetic field
  3. Where the manetic force exerted by the magnet is strongerest

    A. magetism
    B. magnetic poles
    C. magnetic field
    magnetic poles
  4. The groups of atoms with aligned magnetic poles are called

    a. magetism
    b. magnetic field
    c. magnetic domains
    magnetic domains
  5. A temporary magnet made by wrapping a wire coil carrying a current around an iron core

    A. electromagnet
    B. solenoid
    C. galvanometers
    electromagnet
  6. A single wire wrapped into a cylindrical wire coil

    A. electromagnet
    B. solenoid
    C. galvanometers
    solenoid
  7. Devices that use an electromagnet to measure electric current

    A. electromagnet
    B. solenoid
    C. galvanometers
    galvanometers
  8. Device that changes electric energy into magnetic energy

    A. galvanometer
    B. electric motor
    C. generator
    electric motor
  9. The generation of a current by changing a magnetic field

    A. electromagnetic induction
    B. generator
    C. turbine
    electromagnetic induction
  10. Uses electromagnetic induction to transform mechanical energy into electrical energy

    A. galvanometer
    B. electric motor
    C. generator
    generator
  11. Provides electrical energy to operate lights and other accessories in a car

    A. alternator
    B. generator
    C. turbine
    alternator
  12. A large wheel theat rotates when pushed by water, wind, or steam

    A. alternator
    B. generator
    C. turbine
    turbine
  13. True or False

    Both generators and elecric motors use
    magnets to produce energy conversions between electrical and mechanical energy.
    True
  14. Current that flows only one direction through a wire.

    A. alternating current (AC)
    B. direct current (DC)
    direct current (DC)
  15. Reverses the direction of current in a regular pattern

    A. alternating current (AC)
    B. direct current (DC)
    alternating current (AC)
  16. The type of current you use when you plug your computer into the wall.

    A. alternating current (AC)
    B. direct current (DC)
    alternating current (AC)
  17. The type of current a battery produces

    A. alternating current (AC)
    B. direct current (DC)
    direct current (DC)
  18. A device that increases or decreases the voltage of an alternating current.

    A. alternator
    B. transformer
    C. generator
    transformer
  19. True or False

    A tranformer is made of just a primary coil.
    False A transformer is made of a primary and a secondary coil.
  20. The voltage in the primary coil is the

    A. input voltage
    B. output voltage
    input voltage
  21. The voltage in the secondary coil is the

    A. input voltage
    B. output voltage
    output voltage
  22. A transformer that increases the voltage so that the output voltage is greater than the input voltage is a

    A. Step-up transformer
    B. Step-down transformer
    Step-up transformer
  23. A transformer that decreases the voltage so that the output voltage is less than the input voltage is a

    A. Step-up transformer
    B. Step-down transformer
    Step-down transformer
  24. True or False

    Power plants usually produce direct current because voltage can be increased or decreased with transformers.
    False Power plants usually produce alternating current because voltage can be increased or decreased with transformers.

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