Diagram shows an electron gun inside a cathode ray tube. Which of the following is true?

F is Filament, to heat the cathode X

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X is Cathode, to emit the electrons

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Y is Anode, to provide kinetic energy to electrons

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All the above

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Solution

The correct option is D All the above
As the current is passed through the filament F, which gets heated and increase the temperature of cathode X, which upon heating shows photoelectric effect and emit electrons towards the anode Y. Anode is at higher potential and provide kinetic energy to electrons.

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