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A cell having an emf E and internal resi...

A cell having an emf E and internal resistance r is connected across a variable external resistance R. As the resistance R is increased, the plot of potential difference V across R is given by

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Text Solution

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The correct Answer is:
1
As `V=E=Ir=(ER)/(R+r)=(E)/(1+(r)/(R))`
for R=0:V=0
and for `R=oo:V=E`
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