AIPMT MAINS2012Physics-Current Electricity
AIPMT MAINS 2012 Physics Internal Resistance of a Cell MCQ Question
Type: MCQ-conceptual-Medium-Class 12
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:
Correct Answer
Option C
Detailed Explanation
As the external resistance R increases, the potential difference V across R approaches the emf ε. The correct graph is the one that shows V approaching ε asymptotically as R increases.
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