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Emf balanced by 0.75 m of a 4 m, 5 ohm potentiometer wire in series with 992 ohm and a 4 V cell

The same question, asked 2 times: 12 May 2024 S2, 18 Apr 2026 S1. Every wording below, oldest first.

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  1. Question 1

    12 May 2024 S2

    37
    A potentiometer wire of length 4 m and resistance 5 Ω5\,\Omega is connected in series with a resistance of 992 Ω992\,\Omega and a cell of e.m.f. 4 V with internal resistance 3 Ω3\,\Omega. The length of 0.75 m on potentiometer wire balances the e.m.f. of

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  2. Question 2

    18 Apr 2026 S1

    130
    A potentiometer wire of length 44 m and resistance 5 Ω5\,\Omega is connected in series with a resistance of 992 Ω992\,\Omega and a cell of e.m.f. 44 V with internal resistance 3 Ω3\,\Omega. The length of 0.750.75 m on potentiometer wire balances the e.m.f. of

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