Date: Fri, 10 May 2002 11:03:17 -0600

Author: Jerry DiMarco

Subject: Re: GFCIs

Post:


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At 5/10/200209:41 AM, you wrote:
>I think that you would surely want to freeze your tounge with LN2 before
>trying this demo.

Yep, and then if you crack any teeth you could weld them back
together with the current from the wires - sort of like the weld a bolt
demo only in this case, weld a nut might be a more appropriate name. But
seriously, the light bulb must have been a 12 V RV bulb. Had it been 120,
the demonstrator would not have been able to continue the lecture for a
long time, if ever again.
I think one of the driving forces behind the development of GFCIs was
the prevalence of electric shock accidents in bathtubs. So why not base a
demo on that idea, stick the hot lead into a tub connected to earth
ground. If tap water does not conduct well enough at 12 V, add a few
impurities. Demos are especially effective when they make a practical
point as well...

Jerry


>On Fri, 10 May 2002, Ed Sabol wrote:
>
> > I saw a demo once where bare wires were used to light a bulb then the wires
> > were touched to the presentor's tongue. I have thought about it but never
> > tried it. One of these days there may be a defective unit :)
> >


<><><><><><><><><><><><><><><><><><><><><><><><><><><><><>

Jerry DiMarco
Manager of Lecture Demonstrations and Instructional Labs
Montana State Univ., Physics
Dept.
Bozeman, MT

Our Motto: "We don't use anything the way it was meant to be used."

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At 5/10/200209:41 AM, you wrote:

I think that you would surely want
to freeze your tounge with LN2 before

trying this demo.


     Yep, and then if you crack any teeth you could
weld them back together with the current from the wires - sort of like
the weld a bolt demo only in this case, weld a nut might be
a more appropriate name.  But seriously, the light bulb must have
been a 12 V RV bulb.  Had it been 120, the demonstrator would not
have been able to continue the lecture for a long time, if ever
again.

     I think one of the driving forces behind the
development of GFCIs was the prevalence of electric shock accidents in
bathtubs.  So why not base a demo on that idea, stick the hot lead
into a tub connected to earth ground.  If tap water does not conduct
well enough at 12 V, add a few impurities.  Demos are especially
effective when they make a practical point as well...


                                                                Jerry




On Fri, 10 May 2002, Ed Sabol
wrote:


> I saw a demo once where bare wires were used to light a bulb then
the wires

> were touched to the presentor's tongue. I have thought about it but
never

> tried it. One of these days there may be a defective unit :)

>




<><><><><><><><><><><><><><><><><><><><><><><><><><><><><>

                                                                        

 Jerry DiMarco

 Manager of Lecture Demonstrations and Instructional
Labs

 Montana State Univ., Physics
Dept.                                             

 Bozeman, MT



Our Motto: "We don't use anything the way it was meant to be
used."


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