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Arrangement of seven 2 microfarad capacitors that gives a required capacitance

The same question, asked 3 times: 10 May 2023 S1*, 14 May 2024 S1, 25 Apr 2025 S2. Every wording below, oldest first.

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  1. Question 1

    10 May 2023 S1

    6
    Seven capacitors each of capacitance 2 μF2\,\mu F are connected in a configuration to obtain an effective capacitance 613 μF\frac{6}{13}\,\mu F. The combination which will achieve this will have

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  2. Question 2

    14 May 2024 S1

    42
    Which of the following combination of 7 identical capacitors each of 2 μF2\,\mu\text{F} gives a capacitance of 1011 μF\dfrac{10}{11}\,\mu\text{F}?

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  3. Question 3

    25 Apr 2025 S2

    9
    Seven capacitors each of capacitance 2μ F2\mu\text{ }F are to be connected in a configuration to obtain an effective capacitance (1011)μF\left( \frac{10}{11} \right)\mu F. The combination is

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