Question

With fixed dimensions of Cathode Ray Tube (C.R.T), the ratio of electrostatic deflection sensitivity to magnetic deflection sensitivity, if the accelerating voltage is 10 kV, is:

• A. 50 : 1
• B. 1 : 50
• C. 1 : 100
• D. 100 : 1

Hint:

Electrostatic deflection is more sensitive because deflection occurs over the entire plate length, unlike magnetic fields.

Answer 1

The Correct Option is A

The electrostatic deflection sensitivity is significantly higher than magnetic deflection sensitivity. For a typical CRT with 10 kV accelerating voltage: \[ \text{Ratio} = \frac{\text{Electrostatic sensitivity}}{\text{Magnetic sensitivity}} = 50 : 1 \]