Lessons

Eamcet Physics
2 nd Year : Unit 2.1 ( Current Electricity ) - Current Electricity

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Q.

Twelve cells, each having e.m.f ‘E’ volts are connected in series and are kept in a closed box. Some of these cells are wrongly connected with positive and negative terminals reversed. This 12 cell battery is connected in series with an ammeter, an external resistance ‘R’ ohms and a two-cell battery (two cells of the same type used earlier, connected perfectly in series). The current in the circuit when the 12-cell battery and 2-cell battery aid each other. Then the number of cells in 12-cells battery that are connected wrongly is

View Answer

Correct choice: A

Explanation:

None
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