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An evacuated tube, with electrodes at one end and a screen area at the other.

The inside area of the screen is coated with a phosphor material.

The end of the tube nearest the screen is coated with a conductive paint and an outside Anode connection provided.

At the electrode end a Cathode wire is heated by a heater coil.

Further up the neck of the tube is an anode mesh.

A high negative voltage is applied to the anode connection near the screen.

A positive voltage is applied to the Cathode.

A negative voltage on the first anode causes electron released from the heated cathode to accelerate up the tube towards the screen.

The screen anode causes further acceleration causing electrons to hit the inside of the phosphor coated screen.

The electrons hitting the screen causes the phosphor coating to glow.

The stream of electrons can be deflected using electromagnets arranged around the neck of the tube.

The intensity of the flow of electrons can be controlled by a grid between the cathode and first anode.

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Q: Explain the working of cathode ray tube?
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