In an experiment to measure a for a certain gas, it was found that the steady current is 3.8x10 A at a voltage of 8 kV and at a distance of 4 mm between the plane electrodes. Keeping the field constant and reducing the distance to 1 mm resulted in a current of 3.8x10 A.
In an experiment to measure a for a certain gas, it was found that the steady current is 3.8x10 A at a voltage of 8 kV and at a distance of 4 mm between the plane electrodes. Keeping the field constant and reducing the distance to 1 mm resulted in a current of 3.8x10 A.
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Transcribed Image Text:In an experiment to measure a for a certain gas, it was found that the steady current is 3.8x10 A
at a voltage of 8 kV and at a distance of 4 mm between the plane electrodes. Keeping the field
constant and reducing the distance to 1 mm resulted in a current of 3.8×10° A.
(a) Calculate a
(b) Calculate the number of electrons emitted from the cathode to anode
(c) Determine the electrode spacing that would lead to an electron multiplication factor of 10
QUESTION 2
What is Paschen's law? How do you account for the minimum voltage under a given PD condition?
State its value for Air
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