Unit 6 Study Guide

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Unit 6 Study Guide
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2014-03-26 21:31:21
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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. rototating 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 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
  19. changes a week 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 so hot that it glows
    incandescent
  24. kind of light made by vapors flowing through electricity
    fluorescent
  25. if a wire moves through a magnetic field, ____ move 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 different ways
    energy
  29. ordinary household electricity has ____ volts
    120
  30. high voltage electricity is lowered at a _____-
    substation
  31. a circuit must be _____ before electricity will flow trough 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 that the filament lasts longer
    oxygen
  35. the telegraph system was invented by ____ ________
    Samuel Morse
  36. In a loudspeaker system, sound goes into a ______, the resulting current goes to one or more loudspeakers
    microphone, amplifier
  37. what does a circuit breaker protect you from?
    the wire getting too hot
  38. what do three way switches allow you to do?
    turn on and off the same light from different locations
  39. what is the main reason a incandescent light bulb is inside a bulb?
    so the filament is protected from exygen
  40. what what Nichrome be good for?
    a heating element
  41. what is something that a telegram and telephone both do
    rapidly send messages

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