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Math Help - current in Amps and Ions

  1. #1
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    current in Amps and Ions

    Suppose that the resistance between the walls of a biological cell is 1.90 x 10^10 .

    (a) What is the current when the potential difference between the walls is 90 mV?
    in Amps

    (b) If the current is composed of Na+ ions (q = +e), how many such ions flow in 1.5 s?
    in ions

    i know that Ohm's Law (V=IR) probably applies to this problem, along with Electromotive Force
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  2. #2
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    Quote Originally Posted by rcmango View Post
    resistance is 1.90 x 10^10 .
    potential difference between the walls is 90 mV?
    Ohm's Law (V=IR)
    Substitute?

    V = 90 mV

    R = 1.90 x 10^10

    I = V/R = (90 mV) / (1.90 x 10^10)

    Where does that leave us? There is a bit of arithmetic to go.
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