Which of the following is NOT a feature of electromagnetic deflection CRTs?

The correct response indicates that "Poor electron beam control" is not a feature of electromagnetic deflection CRTs. Electromagnetic deflection systems are designed to provide precise control over the electron beam as it scans across the phosphorescent screen. This precision is achieved through the use of magnetic fields created by deflection coils, allowing for accurate positioning of the beam.

In contrast, poor electron beam control would suggest a fundamental flaw in the technology, which contradicts the essential characteristics of electromagnetic deflection CRTs. Features like improved beam position accuracy, enhanced deflection sensitivity, and better image resolution are inherent advantages of this technology, enabling it to produce sharper and more detailed images while effectively controlling the electron beam's movement. Thus, stating that electromagnetic deflection CRTs have poor control is inaccurate, as these systems are precisely engineered for accurate electron beam manipulation.