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[Phys-L] Re: Polarity of a 1F (super) capacitor

Check out other caps. Is not the shorter lead the neg. one?

However this site (below) claims supercaps. are reversed. Usually the
can (case) is negative. Does it have a metal case and is it connected
to one of the leads?

The above is the Google HTML copy of a PDF. The first line includes
the URL for the original (PDF). It appears to be a knowledgeable site.

bc, Googler

Paul D. Price wrote:


I have recently purchased several 1 F electrolytic (super) capacitors for
several labs and demos. However, I am having trouble discerning which side
is positive for the polarity of the capacitor. I note the the cap has a
long and short connector, but there is little else (such as an arrow etc) to
clearly define the polarity. Before I accidentally reverse the polarity
while charging does anyone with a 1F cap have any insight for me to
guarantee the polarity direction?

Paul D. Price
Science Dept. Chair
Trinity Valley School
Ft. Worth, Texas 76132

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