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17 October, 07:58

A smart phone charger delivers charge to the phone, in the form of electrons, at rate of - 0.75 C/s. How many electrons are delivered to the phone during 45 min of charging?

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  1. T
    17 October, 09:13
    0
    Answer: 1.26 * 10^22 electrons

    Explanation: In order to explain this problem we have to use the following relationship:

    the charger delivers - 0.75C/s; during 45 min it will deliver

    -0.75*45*60=2025C

    so considering that the electron charge is - 1.6 * 10^-19 C

    We have:

    -2025 C/-1.6 * 10^-19 C 1.26 * 10^22 electrons
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