Objective Questions on TV camera tube

Objective Questions on TV camera tube

Objective Questions on TV camera tube, MCQs on TV camera tube, Multiple Choice Questions on TV camera tube, MCQ on Plumbicin camera tube, MCQ on Vidicon TV camera tube, MCQ on Image Orthicon Camera tube, MCQ in Television Camera Tube, Engineering MCQ, Television MCQ

Multiple Choice Questions

Electronics from the electron gun strike the target plate of a camera tube with

  • Varying velocity
  • Low velocity
  • High velocity
  • Medium velocity

Answer: Low velocity

In photo emission the number of electron emitted from the target surface

  • Varies directly as the wavelength of incident
  • Varies directly as the frequency of light
  • is independent of wavelength
  • None of these

Answer: is independent of wavelength

Image lag in vidicon is

  • Severe
  • Negligible
  • Absent
  • Equal to the plumbicon

Answer: Severe

Image orthicon is based on

  • Photo conduction principle
  • Photo emission principle
  • Any one of two
  • None of these

Answer: Photo emission principle

Target plate of plumbicon consists of

  • Antimony
  • Trisulphide
  • Selenium tin oxide
  • Lead oxide

Answer: Lead oxide

Spectral response of plumbicon is poor in

  • Blue
  • Green
  • Cyan
  • Red

Answer: Red

Vidicon is suitable for outdoor use because

  • Its variable gamma characteristics
  • Its high contrast capability
  • Its self adjustable senstivity
  • Its good spectral response

Answer: Its good spectral response

Plumbicon has gamma of

  • 0.7
  • Near unity
  • 0.5
  • 0.6 to 0.9

Answer: Near unity

Halo is formed in

  • Vidicon
  • Plumbicon
  • Image orthicon
  • None of these

Answer: Plumbicon

IR respose is maximum in

  • Vidicon
  • Plumbicon
  • Image orthicon
  • Newvicon

Answer: Newvicon

Operation of CCD image sensors is based on

  • Photoconductivity
  • Photovoltic principle
  • Photoemission
  • None of these

Answer: Photovoltic principle

The most suitable camera tube for industrial application is

  • Iconoscope
  • Image orthicon
  • Standard vidicon
  • Plumbicon

Answer: Standard vidicon

The approximate value of target voltage in standard vidicon is

  • 300 V
  • 30 V to 40 V
  • Equal to anode voltage
  • None of these

Answer: 30 V to 40 V

Scanning in solid state camera is not done by deflecting on electron beam but is done by

  • Principle of shift register
  • Principle of picture tube
  • Principle of camera tube
  • None of these

Answer: Principle of shift register

The image lag in a camera tube

  • is a problem of beam aperture
  • is a problem of target plate
  • leads to appearance of ghosts when the picture is reproduced
  • None of these

Answer: is a problem of target plate

The most suitable camera for broadcast purpose is

  • Plumbicon
  • Image orthicon
  • Standard vidicon
  • None of these

Answer: Image orthicon

An image orthicon camera target is

  • always anode potential stabilized
  • always cathode potential stabilized
  • both
  • Non of these

Answer: always cathode potential stabilized

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