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Twelve cells ,each having emf E volts are connected in series and are kept in a closed box.Some of these cells are wrongly conneted with positive and negitive terminals reversed .This 12 cell battery is connected in series with an ammeter, an external resis†an ce R ohm 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 is 3A and is 2A when the y oppose each other.Then the number of cells in 12cell battery tha are connected wrongly is |
| Answer» Twelve cells ,each having emf E volts are connected in series and are kept in a closed box.Some of these cells are wrongly conneted with positive and negitive terminals reversed .This 12 cell battery is connected in series with an ammeter, an external resis†an ce R ohm 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 is 3A and is 2A when the y oppose each other.Then the number of cells in 12cell battery tha are connected wrongly is | |