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In a CRO which of following is not a part of electron gun?
Grid
Cathode
X-Y plates
Accelerating anode
X-Y plates
Quick Summary: The electron gun of a Cathode Ray Tube (CRT) is primarily responsible for generating, controlling, and accelerating a beam of electrons towards the screen. The X-Y plates (also known as deflection plates) are part of the deflection system, situated after the electron gun, and are not considered part of the gun assembly itself.
The electron gun of a Cathode Ray Tube (CRT) is primarily responsible for generating, controlling, and accelerating a beam of electrons towards the screen. The X-Y plates (also known as deflection plates) are part of the deflection system, situated after the electron gun, and are not considered part of the gun assembly itself.
F=qE тАФ Force on electrons due to deflection plates
vzтАЛ=m2eVтАЛтАЛ тАФ Velocity of electrons exiting the accelerating anode
The electron gun consists of a heater, cathode, control grid, pre-accelerating anode, focusing anode, and accelerating anode. Electrons emitted from the cathode are controlled in density by the grid and then accelerated and focused into a fine beam by the various anodes. Once the beam leaves the electron gun, it enters the deflection region, where the X and Y deflection plates apply electric fields to steer the beam onto specific coordinates on the phosphor screen.
The electron gun focuses the electron beam into a fine, narrow point.
The deflection system (X-Y plates) uses electrostatic force to move the beam.
Components of the gun: Heater, Cathode, Grid, Pre-accelerating anode, Focusing anode, Accelerating anode.
Deflection plates are physically separated from the gun by the pre-deflection accelerator.
High input impedance for measurement
Real-time visual analysis of high-frequency signals
Bulkier compared to modern LCD/LED displays
Requires high operating voltages
Voltage measurement and visualization
Analyzing signal waveforms in electronic circuits
The Control Grid is often kept at a negative potential relative to the cathode to regulate beam current.
X-Y plates are arranged in pairs: Vertical deflection (Y) plates are usually placed closer to the gun, followed by Horizontal deflection (X) plates.
C is correct тАФ X-Y plates belong to the deflection system, not the electron gun assembly.
Always remember that the CRT components follow the sequence: Electron Generation -> Acceleration/Focusing -> Deflection. Anything related to movement of the spot belongs to the deflection section.