Are there any uses for cells (batteries) connected in opposition?

  • 4 Replies
  • 5179 Views

0 Members and 1 Guest are viewing this topic.

*

Offline erickejah

  • Sr. Member
  • ****
  • 347
  • Parking? I make my own parking spot!!
    • View Profile
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

  • Guest
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

  • First timers
  • *
  • 3
    • View Profile
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

  • Neilep Level Member
  • ******
  • 8841
    • View Profile
Good answer! I'd never thought of that.
Please disregard all previous signatures.

*

lyner

  • Guest
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!.