Positive and negative ions are produced in the atmosphere due to cosmic rays from space and also due to radioactive elements in the soil. In some region in the atmosphere, the electric field strength is 100 V//m in the vertically downward direction. This field exerts force on the positive and negative ions in the given region in atmosphere. As a result, positive ions, having a density 500//cm^(3) drift downward while negative ions, having a density 300//cm^(3) drift upward. All these ions are singly charged. It is observed that the conductivity in the given region is 4 xx 10^(-13)(Omega - m)^(-1). Find the average speed of ions, assuming it to be the same for positive and negative ions.

Positive and negative ions are produced in the atmosphere due to cosmi

1.	Positive and negative ions are produced in the atmosphere due to cosmic rays from space and also due to radioactive elements in the soil. In some region in the atmosphere, the electric field strength is 100 V//m in the vertically downward direction. This field exerts force on the positive and negative ions in the given region in atmosphere. As a result, positive ions, having a density 500//cm^(3) drift downward while negative ions, having a density 300//cm^(3) drift upward. All these ions are singly charged. It is observed that the conductivity in the given region is 4 xx 10^(-13)(Omega - m)^(-1). Find the average speed of ions, assuming it to be the same for positive and negative ions.
Answer» 1.3`m//s` 0.31`m//s` 0.93`m//s` 1.6 `m//s` ANSWER :B

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