Liquid Crystal Display or LCD objective questions and answers

31. The LCD digital display that is based on

   A.Radiation of light

   B.Reflection of light

   C.Emission of light

   D.Transmission of light

32. The typical value of thickness of liquid layer of LCD's is ...... mm

   A.0.22

   B.2.2

   C.0.025

   D.0.035

33. Which of the following liquid crystal layers are used in LCD's

   A.Heavy water

   B.Nematic

   C.Hydrosulphuric acid

   D.Hydrochloric acid

34. The contrast of liquid crystal display (LCD)

   A.Will increase if the back plate is more reflective

   B.Will decrease if the back plate is more reflective

   C.Will increase if the back plate is less reflective

   D.Will decrease if the back plate is less reflective

35. Which of the following consumes less power?

   A.Incandescent lamp

   B.LCD

   C.Fluorescent tube

   D.LED

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