How many electrons would have to be removed from a coin to leave it with a charge of +1.0 10-7 C?

Question

How many electrons would have to be removed from a coin to leave it with a charge of +1.0 10-7 C?

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Linh Đan 4 years 2021-08-06T00:39:35+00:00 1 Answers 103 views 0

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  1. ngocdiep
    0
    2021-08-06T00:41:33+00:00
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    Answer:

    n=6.25\times 10^{11}

    Explanation:

    We need to find the number of electrons that would have to be removed from a coin to leave it with a charge of +10^{-7}\ C. Then the number of electrons be n. Using quantization of electric charge as :

    q = ne

    e is charge on an electron

    n=\dfrac{q}{e}\\\\n=\dfrac{10^{-7}}{1.6\times 10^{-19}}\\\\n=6.25\times 10^{11}

    So, the number of electrons are 6.25\times 10^{11}.

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