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Published byAvery Heater Modified over 10 years ago
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I’m COOL!
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And very SMART!
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Bet you don’t know how to charge a pith ball by INDUCTION
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What is a pithball?
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Voilà!
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A Styrofoam ball coated with graphite.
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I told you I was very SMART!
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Yes, charging by Induction...
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Let’s charge the pith ball NET NEGATIVE by induction.
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Oh No, Mr. Bill! Not Net Negative by Induction.
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Sorry, Sometimes I just get carried away.
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Charging by induction is the charging of an isolated conducting object by...
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...momentarily grounding it while a charged object is nearby.
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First we start with a NEUTRAL pith ball..
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A neutral pith ball has an EQUAL number of
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PROTONS ELECTRONS! and
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We’ll now show a representative sample of POSITIVELY charged protons in our pith ball.
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For the pith ball to be neutral there must be an equal number of electrons.
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Remember we are charging the pith ball NEGATIVE by induction therefore we need a POSITIVE rod nearby.
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Bring the POSITIVELY CHARGED rod close BUT don’t allow it to touch.
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The electrons in the pith ball are attracted to the positive rod and move close to the rod.
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Now touch the positive side of the pith ball with a neutral object.
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This is called grounding.
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Electrons from the neutral object flow into the positive side of the pith ball.
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Remove the neutral source of electrons.
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Remove the positively charged rod.
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And now you have a NEGATIVELY charged pith ball!
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Notice the electrons redistribute themselves.
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The pith ball acquired a net charge that was OPPOSITE that of the charging object by:
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Gaining electrons from another neutral object called a ground.
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WOW!
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I luv physicks
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by Richard Terwilliger
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