Current Electricity and Electrical InstrumentHard
Question
A cell of emf E having an internal resistance r is connected to an external resistance R. The potential difference V across the resistance R varies with R as shown in figure by the curve :
Options
A.A
B.B
C.C
D.D
Solution
VR =
R = 
R → 0 VR = 0
& R → ∞ VR = E
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