Dry air can support a maximum electric field strength of about 10 x 10^6 V/m. The field creates enough ionization in the air to make the air a conductor. what is the the voltage between two parallel conducting separated by 2.5 cm of dry air
The voltage
"V=Ed\\\\\n=10*10^6*0.025=250000\\:\\rm V=250\\: kV"
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