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NEET2018PhysicsCurrent ElectricityActual

A battery consists of a variable number 'n' of identical cells (having internal resistance 'r' each) which are connected in series. The terminals of the battery are short-circuited and the current I is measured. Which of the graphs shows the correct relationship between I and n?

Correct answer

3

Step-by-step solution

In series, ε n e t = n ε and r n e t = n r current in circuit I = n ε n r = ε​ r = constant. ⇒ I independent of n

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