Date: Tue, 27 Mar 2012 14:52:26

Author: --- Doug Johnson

Subject: Re: cotton cloth for electrostatics

Post:


Just for fun I tried this combination and found the acrylic charges up
positive with a cotton shirt.
A while back I was having mixed results using rabbit fur. One time the
acrylic rod was positive and the next time it was negative. Since then I
only use a paper towel on both the pvc and acrylic rods and every time get
the correct charges.
Thanks goes to Cliff Bettis for letting us know about this, the paper
towel has been my permanent replacement for rabbit fur ever since!

...Doug J.


On 3/27/12 5:43 AM, "Rueckner, Wolfgang" wrote:

> not my acrylic-- Wolfgang
>
>
>
> On Mar 26, 2012, at 6:45 PM, John Welch wrote:
>
>> Acrylic gets a higher charge than glass, but it gets a negative charge with
>> cotton, just like PVC.
>> -John
>>
>> Rueckner, Wolfgang wrote:
>>>
>>> Acrylic (a.k.a. plexiglass) is even better than glass. You can get negative
>>> charges by rubbing a cotton t-shirt on a PVC rod and positive charges by
>>> rubbing the same shirt on an acrylic rod. -- Wolfgang
>>>
>>>
>>>
>>>
>>> On Mar 22, 2012, at 7:46 PM, John Welch wrote:
>>>
>>>
>>>> I just looked at a triboelectric series chart, noticed that cotton is
>>>> right in the middle, and tried it with both PVC and glass rods. It works
>>>> about the same as wool and PVC and it works tons better than silk for
>>>> the glass. Now I don't need to bother with silk and wool, which are
>>>> harder to obtain or wash. Just sharing.
>>>>
>>>> --
>>>> ******************************
>>>> John Welch
>>>>
>>>> Cabrillo College Physics Dept.
>>>>
>>>>
>>>
>>>
>>>
>>>
>>
>> --
>> ******************************
>> John Welch
>>
>> Cabrillo College Physics Dept.
>
>




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