Cathode Ray Tube

Electrical Measurements

This set of Electrical Measurements & Measuring Instruments Multiple Choice Questions & Answers (MCQs) focuses on “Cathode Ray Tube”.

1. Electron gun section ________
a) provides sharp beam
b) provides poorly focussed beam
c) doesn’t provide any beam
d) provides electrons only

2. Control grid is given ________
a) positive voltage
b) negative voltage
c) neutral voltage
d) zero voltage

3. What determines light intensity in a CRT?
a) voltage
b) current
c) momentum of electrons
d) fluorescent screen

4. Effect of negative voltage to the grid is ________
a) no force
b) a gravitational force
c) an attractive force
d) a repulsive force

5. Electron beam diverges.
a) True
b) False

6. Focusing and accelerating anodes are ________
a) rectangular
b) cylindrical
c) spherical
d) square

7. Deflection system of a CRT consists of ________
a) 4 plates
b) 6 plates
c) 2 plates
d) 8 plates

8. Horizontal deflection is given by ________
a) x = Kx
b) x = Vx
c) x = 1
d) x = Kx Vx

9. Vertical deflection is given by ________
a) y = Ky Vy
b) y = Ky
c) x = 1
d) y = Vy

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