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13 November, 13:13

Four identical metallic objects carry the following charges: + 1.51, + 6.28, - 4.69, and - 9.07C. The objects are brought simultaneously into contact, so that each touches the others. Then they are separated. (a) What is the final charge on each object? (b) How many electrons (or protons) make up the final charge on each object?

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  1. 13 November, 14:57
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    (a) - 1.4925 C

    (b) 9.328 x 10^18

    Explanation:

    q1 = + 1.51 C

    q2 = + 6.28 C

    q3 = - 4.69 C

    q4 = - 9.07 C

    (a) As they touch each other, the conduction takes place.

    Q = q1 + q2 + q3 + q4 = + 1.51 + 6.28 - 4.69 - 9.07 = - 5.97 C

    There are four objects, so the charges are distributed equally.

    Q = q / 4 = - 5.97 / 4 = - 1.4925 C

    (b) As the negative charge is there so it has some excess electron.

    Let n be the number of electrons

    n = total charge / charge of one electron

    n = 1.4925 / (1.6 x 10^-19) = 9.328 x 10^18
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