A steady current of 400 µA flows through the plane electrode separated by a distance dof 0.5 cm when a voltage of 12 kV is applied. Determine Townsend's first ionization coefficient if a current of 80 A flows when the separation distance is reduced to 0.1 cm, and the field is kept constant at the previous value.

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Coulomb’s Law

Coulomb's law states that the attraction or repulsion force between two charged things is proportional to the product of their charges and inversely proportional to the square of their distance. It has an effect along the line that connects the two-point charges.