Unit 6 Study Guide

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Unit 6 Study Guide
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2014-03-28 11:07:46
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  1. path that electricity follows
    circuit
  2. tiny particles that make up electricity
    electrons
  3. changes high voltage to a lower, safer voltage.
    transformer
  4. rotating electromagnet in a motor
    armature
  5. rotating switch on an armature
    commutator
  6. stationary magnet on a motor
    field magnet
  7. flow of electricity in a circuit
    current
  8. part that produces the sound of an electric bell
    gong
  9. in an electric stove, the part that makes heat.
    heating element
  10. thin disk for receiving a sound
    diaphragm
  11. glows white hot in a light bulb
    filament
  12. switch operated by an electromagnet
    relay
  13. area of force around a magnet
    magnetic field
  14. metal used for filaments in light bulbs
    tungsten
  15. uses electricity to produce magnetism
    electromagnet
  16. metal used for heating elements
    Nichrome
  17. unit for measuring electrical pressure
    volt
  18. small light that uses little electricity
    light emitting doide (LED)
  19. changes a weak signal to a strong signal
    amplifier
  20. mouthpiece for a loudspeaking system.
    microphone
  21. protects a circuit from too much electrical current
    circuit breaker
  22. contains a paper cone vibrated by an electromagnet
    loudspeaker
  23. kind of light from something made so hot that it glows
    incandescent
  24. kind of light made by electricity flowing through vapors
    fluorescent
  25. if a wire moves through a magnetic field, ______ moves through the wire
    electrons
  26. _______ magnetic poles repel each other, and ______ poles attract each other.
    like, unlike
  27. a _____ transformer increases the voltage
    step-up
  28. electricity is a very useful form of _______ that can be used in many ways
    energy
  29. ordinary household electricity has _____ volts
    120
  30. high-voltage electricity is lowered fro a local community at a _________
    substation
  31. a circuit must be ______ before electricity will flow through it
    closed
  32. in an electric motor, the field south pole attracts the armature _______ pole
    north
  33. tungsten makes a good filament because it has a high ________ ______
    melting point
  34. the ______ is removed from a light bulb so the filament lasts longer
    oxygen
  35. the telegram system was invented by ______ ______
    Samuel Morse
  36. in a loudspeaking system, sound goes into a _______, the resulting current strengthened by a _______, and that current goes to more loudspeakers
    microphone, amplifier
  37. in a loudspeaker, electricity goes through an ________ that causes the cone to vibrate
    electromagnet
  38. it is right to use a loudspeaker to communicate ____ messages
    good

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