STANDARDPhysics-Current Electricity
STANDARD Physics Internal Resistance of a Cell MCQ Question
Type: MCQ-conceptual-Medium-Class 12
A cell having an emf ε 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
A
(1)
B
(2)
C
(3)
D
(4)
Correct Answer
Option B
Detailed Explanation
As R increases, the potential difference V across R approaches the emf ε. The correct graph is a curve starting from the origin and asymptotically approaching ε, which is shown in Option 2.
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