Question

A battery consist of a variable number of n identical cells having internal resistance r each. They are connected in parallel. The terminal of battery is short-circuited and the current I is measured. Which of the following graphs give correct relationship between I and n?

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Solution

The correct option is **B**

As n cells are in parallel so net resistance Rn=r/n

Now current is I=ERn=Enr where E= emf of battery.

This is a straight line equation (y=mx) graph.

As n cells are in parallel so net resistance Rn=r/n

Now current is I=ERn=Enr where E= emf of battery.

This is a straight line equation (y=mx) graph.

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