Which component in a CRT directly controls the electron beam deflection to position the image?

Which component in a CRT directly controls the electron beam deflection to position the image?

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

Answer: (A)

The part that positions the image on a CRT is the deflection system. It directly bends the electron beam as it travels toward the phosphor screen, using either electrostatic deflection plates or magnetic deflection coils (the deflection yoke) to create horizontal and vertical fields. These fields steer the beam to different spots on the screen, forming the image. The anode’s job is to accelerate the electrons toward the screen, not to steer them. The cathode is the electron source. Aquadag is a conductive coating used to control charge buildup inside the tube, not to deflect the beam.

The part that positions the image on a CRT is the deflection system. It directly bends the electron beam as it travels toward the phosphor screen, using either electrostatic deflection plates or magnetic deflection coils (the deflection yoke) to create horizontal and vertical fields. These fields steer the beam to different spots on the screen, forming the image.

The anode’s job is to accelerate the electrons toward the screen, not to steer them. The cathode is the electron source. Aquadag is a conductive coating used to control charge buildup inside the tube, not to deflect the beam.