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Define one volt

The same question, asked 3 times: 2024*, 2025*, 2026. Every wording below, oldest first.

Try each one first, then open its answer.

  1. Question 1

    2024

    36 (b)
    (i) When is the potential difference between two points said to be 1 volt ? (ii) A copper wire has a diameter of 0⋅20{\cdot}2 mm and resistivity of 1⋅6×10−8 Ω1{\cdot}6 \times 10^{-8}\,\Omega m. What will be the length of this wire to make its resistance 14 Ω14\,\Omega ? How much does the resistance change, if the diameter of the wire is doubled ?

  2. Question 2

    2025

    33
    (a) Explain the statement “Potential difference between two points is 1 volt”. (b) What do the symbols given below represent in an electric circuit ? Write one function of each.

  3. Question 3

    2025

    32
    Define the term “potential difference” between two points in an electric circuit carrying current. Name and define its S.I. unit. Also express it in terms of S.I. unit of work and charge.

  4. Question 4

    2026

    34
    (a) Define volt, the unit of potential difference. (b) Calculate the work done required to move an electron between two points A and B located at a potential difference of 100 V in an electric field.