I’m COOL! And very SMART! Bet you don’t know how to charge a pith ball by INDUCTION.

I’m COOL!

And very SMART!

Bet you don’t know how to charge a pith ball by

INDUCTION

What is a pithball?

Voilà!

A Styrofoam ball coated with graphite.

I told you I was very SMART!

Yes, charging by Induction...

Let’s charge the pith ballNET NEGATIVE

by induction.

Oh No, Mr. Bill! Not

Net Negative by Induction.

Sorry, Sometimes I just get carried away.

Charging by induction is the charging of an isolated conducting object by...

...momentarily grounding itwhile a charged object is

nearby.

First we start with a NEUTRAL pith ball..

A neutral pith ball has an EQUAL number of

PROTONS

ELECTRONS!

and

We’ll now show a representative sample of POSITIVELY

charged protons in our pith ball.

For the pith ball to be neutral there must be an equal number of electrons.

Remember we are charging the pith ball NEGATIVE by

induction therefore we need a POSITIVE rod nearby.

Bring the POSITIVELY CHARGED rod close

BUT don’t allow it to touch.

The electrons in the pith ball are attracted to the positive rod and move close to the

rod.

Now touch the positive side of the pith ball with a neutral

object.

This is called grounding.

Electrons from the neutral object flow into the positive

side of the pith ball.

Remove the neutral source of electrons.

Remove the positively charged rod.

And now you have a NEGATIVELY

charged pith ball!

Notice the electrons redistribute themselves.

The pith ball acquired a net charge that was OPPOSITE that of the charging object

by:

Gaining electrons from another neutral object called a ground.

I luv physicks

by

Richard Terwilliger

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