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Potential at the centre of a charged half ring

This type of question, asked 2 times: 24 Jan 2023, 9 Apr 2024. All 2 questions below, oldest first.

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  1. Question 1

    24 Jan 2023

    95
    The electric potential at the centre of two concentric half rings of radii R1R_{1} and R2R_{2}, having same linear charge density λ\lambda is:

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  2. Question 2

    9 Apr 2024

    22
    At the centre of a half ring of radius R=10 cmR = 10\text{ }cm and linear charge density 4nCm−14nCm^{- 1}, the potential is xπVx\pi V. The value of xx is ____