Television Camera Tubes – Exercise – 1

Television Camera Tubes » Exercise – 1

1. Electrons from the electron gun strike the target plate of a camera tube with :

(a)  Varying velocity
(b)  Low velocity
(c)  High velocity
(d)  Medium velocity

Answer
Answer : (b)
Explanation
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2. Image orthicon is based on :

(a)  Photo conduction principle
(b)  Photo emission principle
(c)  Any one of two
(d)  None of these

Answer
Answer : (b)
Explanation
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3. Vidicon is suitable for outdoor use because :

(a)  Its variable gamma characteristics
(b)  Its high contrast capability
(c)  Its self adjustable sensitivity
(d)  Its good spectral response

Answer
Answer : (d)
Explanation
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4. Operation of CCD image sensors is based on :

(a)  Photoconductivity
(b)  Photovoltic principle
(c)  photoemission
(d)  None of these

Answer
Answer : (b)
Explanation
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5. The image lag in a camera tube :

(a)  Is a problem of beam aperture
(b)  Is a problem of target plate
(c)  Leads to appearance of ghost when the picture is reproduced
(d)  None of these

Answer
Answer : (b)
Explanation
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