Question

why does electric discharge take test at low pressure and high potential difference?​

Answer 1

Answer:

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At low pressure and high potential difference, its means free path for the charged particles increased and they acquired sufficient k.E to produce ionized. More ions and electron are produced in the gas due to collision.

Answer 2

Answer:

Hence electric discharge takeplaced at high potential and low pressure. It is because when the gas is at very low pressure positive charged ions are not available to eject out the electron from the cathode hence the discharge current stops.No, vacuum cannot conduct electricity.

Explanation: