3. In an experiment in a certain gas it was found that the current is 5.5x10-8 A at 8 kV at a distance of 0.4 cm between

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3 In An Experiment In A Certain Gas It Was Found That The Current Is 5 5x10 8 A At 8 Kv At A Distance Of 0 4 Cm Between 1 (94.52 KiB) Viewed 33 times

3. In an experiment in a certain gas it was found that the current is 5.5x10-8 A at 8 kV at a distance of 0.4 cm between the plane electrodes. Keeping the field constant and reducing the distance to 0.1 cm results in the current of 5.5 x 10-⁹ A. (a) Calculate Townsend's primary ionization coefficient a correct to 1 decimal place. [5 marks] (b) If the breakdown occurred when the gap distance was increased to 0.9 cm, what is the value of the Townsend's secondary ionization coefficient y? [5 marks]