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A Cell of Emf ‘E’ and Internal Resistance ‘R’ is Connected Across a Variable Resistor ‘R’. Plot a Graph Showing the Variation of Terminal Potential ‘V’ with Resistance R. Predict from the Graph - Physics

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A cell of emf ‘E’ and internal resistance ‘r’ is connected across a variable resistor ‘R’. Plot a graph showing the variation of terminal potential ‘V’ with resistance R. Predict from the graph the condition under which ‘V’ becomes equal to ‘E’.

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Solution

V becomes equal to E when no current flows through the circuit.

The condition under which V will be equal to E is when R = ∞

Concept: Cells, Emf, Internal Resistance
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