Q.
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 ?
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a
b
c
d
answer is A.
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Detailed Solution
Current drawn from the cell isI=nεnr=εrSo, I is independent of n and I is constant.
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