Re: Pinhole Digest #629 - 04/23/01

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From: Deb Jensen (deb@meer.net)
Date: Mon Apr 23 2001 - 12:51:09 PDT 

Message-Id: <l03110701b70a37aa1028@[172.20.8.114]>
Date: Mon, 23 Apr 2001 12:51:09 -0700
From: Deb Jensen <deb@meer.net>
Subject: Re: Pinhole Digest #629 - 04/23/01

>Pinhole Digest #629 - Monday, April 23, 2001
>
> capacitors
> by "Yibi Smith" <yibsmith@jps.net>
>
>
>----------------------------------------------------------------------
>
>Subject: capacitors
>From: "Yibi Smith" <yibsmith@jps.net>
>Date: Sun, 22 Apr 2001 07:35:27 -0700
>
>My physics class is currently studying capacitors. I do not know a
>demonstration or any student activities or experiments to do to demonstrate
>capacitance. Does any one have any good, not too equipment intensive,
>ideas? Yibi Smith, Dixon High School.
>

We do a basic demo with homemade Leyden jars - wrap the outside of a plastic
film canister with foil. Fill the canister with water, and put on the lid.
Poke a nail through the lid. The nail can be charged with fur/rubber rod,
and if they do it about 100 times or so they can get a good shock when they
discharge it by touching foil and nail simultaneously with one hand.

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