Question
Sat February 21, 2009 By: Shryans Baid

Terminal Voltage

Expert Reply
Sun February 22, 2009

We have P.D. across two ends as following in the two cases:

1)open circuit,   V=E

2)Closed cicuit,V=E-Ir  

In above,E=EMF of cell,r=internal resistance of cell,I=Current flowing when circuit is closed.

Clearly potential difference is more in case of open circuit then closed circuit.

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