The conductive graphite coating inside a CRT is called what?

The conductive graphite coating inside a CRT is called what?

• A. Aquadag
• B. Anode
• C. Cathode
• D. Screen

Answer: (A)

The conducting graphite coating inside a CRT is called Aquadag. This graphite layer sits on the inner glass surface facing the phosphor and provides a uniform, low-resistance path to ground (or a controlled potential). By blee ding off static charges, it prevents charge buildup on the insulating phosphor layer, which helps keep the electron beam stable and the image bright and evenly focused. The other terms refer to different parts: the anode accelerates the electrons, the cathode emits them, and the screen is the phosphor-coated face that emits light when struck by electrons. Aquadag specifically describes that graphite coating.

The conducting graphite coating inside a CRT is called Aquadag. This graphite layer sits on the inner glass surface facing the phosphor and provides a uniform, low-resistance path to ground (or a controlled potential). By blee ding off static charges, it prevents charge buildup on the insulating phosphor layer, which helps keep the electron beam stable and the image bright and evenly focused. The other terms refer to different parts: the anode accelerates the electrons, the cathode emits them, and the screen is the phosphor-coated face that emits light when struck by electrons. Aquadag specifically describes that graphite coating.