(i) Thermionic emission i.e. the filament heats up the cathode.
(ii) A spot is seen on the screen
(iii) (I) To focus the electrons towards the screen
(II) To accelerate the electrons towards the screen
johnmulu answered the question on June 6, 2017 at 05:28
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Date posted: June 6, 2017. Answers (1)
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Date posted: June 6, 2017. Answers (1)
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Date posted: June 5, 2017. Answers (1)
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