Which of the following is not a component of Memory tube display ?

Answer: Liquid Crystal

Liquid crystal is not a component of a memory tube display. Memory tube displays are vacuum, electron-beam based storage tubes and use components associated with electron emission and charge storage, not liquid crystal materials.

• Flooding gun: provides a uniform electron flux used to sustain or erase stored patterns on the phosphor surface.

• Collector: collects excess electrons and helps maintain the stored charge distribution necessary for display memory.

• Ground: provides the reference potential and return path required for proper tube operation.

• Liquid crystal: a material used in liquid crystal displays (LCDs); it is not used in vacuum electron-beam memory or storage tubes.