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Error in resistance or resistivity from a wire's length and diameter

This type of question, asked 2 times: 31 Jan 2024, 1 Feb 2024. All 2 questions below, oldest first.

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  1. Question 1

    31 Jan 2024

    9
    If the percentage errors in measuring the length and the diameter of a wire are 0.1%0.1\% each. The percentage error in measuring its resistance will be:

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  2. Question 2

    1 Feb 2024

    14
    The radius (r), length (l)(l) and resistance (R) of a metal wire was measured in the laboratory as
    r=(0.35±0.05)cmr = (0.35 \pm 0.05)cm
    R=(100±10)R = (100 \pm 10) ohm
    l=(15±0.2)cml = (15 \pm 0.2)cm
    The percentage error in resistivity of the material of the wire is:

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