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Answer :
Final answer:
To achieve a 6 V battery using 1.5 V cells, the correct arrangement would be a series connection of four cells. This sums up the individual voltages to the desired 6 V but also adds up their internal resistances. So the correct option is 1) Series connection
Explanation:
To create a battery of 6 V using cells with an e.m.f of 1.5 V each, you need to connect them in series connection. In a series connection, the total voltage is the sum of the voltages of all cells connected end-to-end. For example, connecting four cells in series, each with an e.m.f of 1.5 V, would yield a battery of 6 V (1.5 V + 1.5 V + 1.5 V + 1.5 V = 6 V).
However, keep in mind that connecting cells in series also increases the total internal resistance, which can reduce the efficiency and performance of the battery. This was evident in cases such as an old vehicle that used two 6-V batteries in series instead of a single 12-V battery, resulting in higher internal resistance and difficulty starting the engine.
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