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8 July, 12:19

What is the current produced by the solar cells of a pocket calculator through which 4.00 C of charge passes in 4.00 hr? Give your answer in mA.

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  1. 8 July, 12:40
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    The average current passing through a device is given by:

    I = Q/Δt

    I is the average current

    Q is the amount of charge that has passed through the device

    Δt is the amount of elapsed time

    Given values:

    Q = 4.00C

    Δt = 4.00hr = 14400s

    Plug in the values and solve for I:

    I = 4.00/14400

    I = 0.000277777778A

    I = 0.278mA
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