What does deflection sensitivity measure in a CRO?
A
Voltage across plates B
Beam intensity C
Beam deflection per unit voltage D
Screen resolution
Analysis & Theory
It measures how much the beam moves for a given voltage.
What is the unit of deflection sensitivity?
A
Volt/mm B
mm/V C
V/m D
N/C
Analysis & Theory
It is typically measured in mm/V (millimeters per volt).
Deflection Sensitivity (S) is calculated using:
A
S = V / D B
S = D / V C
S = l / V D
S = D * V
Analysis & Theory
S = D/V where D is deflection and V is voltage.
If deflecting voltage is 5V and deflection is 25mm, what is the sensitivity?
A
1 mm/V B
5 mm/V C
0.2 mm/V D
25 mm/V
Analysis & Theory
S = 25 mm / 5 V = 5 mm/V
Which of these decreases deflection sensitivity?
A
Increasing distance to screen B
Reducing plate length C
Increasing accelerating voltage D
Decreasing plate separation
Analysis & Theory
Higher accelerating voltage increases electron speed, reducing sensitivity.