JEE PHYSICS MCQ: CURRENT ELECTRICITY

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Application +4 | -1

\mathrm{12}\,\,\mathrm{cells}

each having same emf are connected in series with some cells wrongly connected. The arrangement is connected in series with an ammeter and two cells which are in series. Current is

3\,\,A

when cells and battery aid each other and is

2\,\,A

when cells and battery oppose each other. The number of cells wrongly connected is

View answer and explanation

Correct option: B

Option B (1) is correct because solving the system of equations derived from the given conditions yields one wrongly connected cell.

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