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Author Topic: Are there any uses for cells (batteries) connected in opposition?  (Read 5091 times)

Offline erickejah

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Is there any specific use of series-opposing sources in the global industry, or scientific research?
 (pic. from ISBN 10:1-4180-0541-X)
« Last Edit: 09/11/2008 03:43:08 by erickejah »


 

lyner

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You use 'series opposing' connection in the old method of calibrating  standard voltage cells with a potentiometer. You go for the condition where no current flows due to the two voltages canceling.
http://en.wikipedia.org/wiki/Determining_emf_of_primary_cells_using_potentiometer
Did it when I was in A Level Physics at School.
 

Offline BH

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Also, if you have a torch that keeps getting turned on by accident and wasting battery capacity, turn half the batteries round so they are in opposition, until you want it to work
 

Offline Bored chemist

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Good answer! I'd never thought of that.
 

lyner

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A novel idea that would work as long as the cells were all in the same batch and in the same state. Any asymmetry could allow a small discharge. A strip of plastic breaking the circuit might be more reliable but - good try!.
 

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