13. Suppose that the strength of the electric field about an isolated point charge has a certain value at a distance of 1 m. How will the el

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13. Suppose that the strength of the electric field about an isolated point charge has a certain value at a distance of 1 m. How will the electric field strength compare at a distance of 2 m from the point charge

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Helga 1 year 2021-09-05T05:35:58+00:00 1 Answers 322 views 0

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    2021-09-05T05:37:46+00:00

    Answer: E/4 ( one – fourth of it electric field)

    Explanation:

    The electric field of a point charge is given below as

    E =kq/r²

    E = electric field,

    K = electric constant

    q = magnitude of electric charge

    r = distance between point charge and electric field.

    It can be seen that only E and r are the only variable here and also, E is inversely proportional to r²

    Which implies that

    E = k/r² , k = E × r²

    E1 ×(r1)² = E2 × (r2)²

    Let E1 = E, r1 =1, r2 = 2 and E2 =?

    Let us substitute the parameters

    E × 1 = E2 × 2²

    E × 1 = E2 × 4

    E = E2 × 4

    E2 = E/4

    Which implies that the electric field at the second distance (r =4) is one fourth of the initial electric field.

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