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Terminal pd and emf

  1. Aug 27, 2011 #1
    when is terminal pd greater than emf ?
  2. jcsd
  3. Aug 27, 2011 #2
    You need to explain your terms and circumstances more thoroughly.
  4. Aug 29, 2011 #3
    Terminal pd of a cell exceeds the emf when the cell is charging.
  5. Aug 29, 2011 #4
    Hi, EMF of a cell is the pd across its terminals when no current is drawn from it. Terminal voltage is the PD across a cell when a current is drawn from it. When the circuit drawn current e.m.f is larger than terminal voltage. During charging terminal voltage lags behind the e.m.f.
  6. Aug 29, 2011 #5
    Terminal voltage V=E-Ir , when nod charging. Where,E:EMF of the cell. I:current. r:internal resistance of the cell.
    Terminal voltage,V=E+Ir , when charging.
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