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Homework Help: Cell emf.

  1. Oct 9, 2009 #1
    Does the emf of a battery remain its specified value for a long time. It is under discharging when connected to the external resistor, so shouldn't its emf value continuously decrease in that case?

    A battery's emf value increases from 0(completely discharged state) to the specified value. Isn't this what's called charging?
  2. jcsd
  3. Oct 9, 2009 #2


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    Well the chemicals within the battery can run out, that is why the emf decreases over time. Which is why batteries run out of energy.
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