24 In The Lower Atmosphere Of The Earth There Are Negative And Positive Ions Created By Radioactive Elements In The So 1 (40.36 KiB) Viewed 15 times
24 In The Lower Atmosphere Of The Earth There Are Negative And Positive Ions Created By Radioactive Elements In The So 2 (40.6 KiB) Viewed 15 times
24. In the lower atmosphere of the Earth there are negative and positive ions, created by radioactive elements in the soil and cosmic rays from space. In a certain region, the atmospheric electric field strength is 120 V/m, directed vertically down. Due to this field, singly charged positive ions, 620 per cm³, drift downward, and singly charged negative ions, 550 per cm³, drift upward; see Fig. 29-21. The measured conductivity is 2.70 X 10-14/02 m. Calculate (a) the ion drift speed, as-
sumed to be the same for positive and negative ions; and (b) the current density. tw E FIGURE 29-21. Exercise 24.
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