(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

At a high point in the Earth’s atmosphere, He2+ ions in a concentration of 2.8 x 10^12 m^-3 are moving due north at a speed of 2.0x10^6 m/s. Also, a 7.0 x 10^11m^-3 concentration of (O2)- (dioxygen -)ions is moving due south at a speed of 7.2 x 10^6m/s. Determine the magnitude and direction of the net current passing through unit area.

2. Relevant equations

I have no idea how to even approach this question... I think there is some law or sth that I don't know.

3. The attempt at a solution

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# Homework Help: Magnitude of current passing through unit area in atmosphere(He2+ and O2-)

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