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Describe the electronic discharge? Electronic discharge can be explain as: 1) The passage of electric current through air is called  electric discharge  through the air. 2) When a small potential difference is applied across the two electrodes in dry air, at atmospheric pressure, no discharge passes through air is a bad conductor of electricity since it does not contain free positive or negative ions. 3) When a very strong potential difference is applied across the two electrodes in a discharge tube and the pressure of air/gas is lowered gradually, then a stage is reached at which the current beings to flow through the air with cracking noise. The potential difference at which it happens is called sparking potential. Electronic discharge 4)  The value of sparking potential depends upon- a) the nature of gas, b) the pressure of the gas,c) the nature of electrodes and d) distance  between the electrodes. 5) The value of sparking potential V is...