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Television Camera Tubes – 1 – 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

EXPLANATION

2. Image orthicon is based on :

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

ANSWER

EXPLANATION

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

EXPLANATION

4. Operation of CCD image sensors is based on :

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

ANSWER

EXPLANATION

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

EXPLANATION

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