Van de Graf Generator - PowerPoint PPT Presentation

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Van de Graf Generator

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Van de Graf Generator P, n What is electricity? Current vs Charge Continuous Vs Intermittent What type of charge does the generator generate? – PowerPoint PPT presentation

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Title: Van de Graf Generator


1
Van de Graf Generator
  • P, n

2
What is electricity?
3
  • Current vs Charge
  • Continuous Vs Intermittent

4
What type of charge does the generator generate?
5
How does it operate
  • Van de Graf Generator
  • Generates a static electric charge
  • Motor rotates a brush which generates the charge
  • Brush comes in contact with a moving rubber belt
    which takes the charge and moves it upward
  • A second brush takes the charge off the belt and
    connects to the dome
  • Since the dome is round, the charge spreads evenly

6
Electricity and force
  • Anything that is touching just the dome will also
    be charged
  • If objects are all charged the same way, they
    will want to electrically repel each other
  • If the electric repulsion force is larger than
    the weight of the objects and friction, they will
    move apart

7
Electricity and Energy
  • Work is being done to the objects flying.
  • Macroscopically, the energy was stored on the
    generator (PE) and converted to KE when object
    moved

8
Cup of paper
  • Attached to top of dome

9
What will happen when somebodys hand approaches
the sphere?
10
What happens is the same as with lightning during
a storm
11
What happens if you are already touching the
machine when it is turned on?
12
Insulation
  • To be electrically separated from the Earth
  • We will use rubber mats and newspaper

13
Hair and Static Charge
  • Why does the hair rise off your head or arms?
  • Does the risen strands of hair seem to want to be
    next to each other? Can you explain their action?

14
What happens if you are insulated and you touch
someone who is not?
15
How Far can we send the electricity?
16
What is moving from person to person?
17
Energy is being transferred not electrons
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