The measurement in Table 1 were taken from a Townsend discharge at a constant electric field region.
|Electrode spacing (mm)||1||2||3||4||6||8||10||12|
|Discharge current (mA)||6||8||10||15||20||40||70||130|
Using these measurements, calculate:
i. the value of the first and second ionization coefficient
ii. the critical value of electrode spacing that can cause breakdown and
iii. explain the reason why the current value increase with the increase in electrode spacing.
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