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Illumination

Illumination
Candela is the unit of which?

 Frequency.
 Luminous flux.
 Luminous intensity.
 Wavelength.

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Illumination
Solid angle is expressed in terms of

 radians / meter.
 degree.
 steredians.
 radians.

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Illumination
What is the work of a driver in case of an LED?

 To convert DC to AC
 Both ‘a’ and ‘b’
 To convert AC to DC
 None of these

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Illumination
Total flux or lumens required in any lighting scheme depends inversely on

  reflection factor.
  utilization factor.
  reduction factor.
None of these

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Illumination
The solid angle subtended by an area of 2400 cm2 on the surface of a sphere of diameter 1.2 m is

 1 / 3.
 2 / 5.
  2 / 3.
  3 / 2.

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Illumination
Which lamps can be directly connected to a solar cell?

 Compact Fluorescent
 LED
 Metal Halide
 Incandescent

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MORE MCQ ON Illumination

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