46.  Mechanical energy is countered into electrical energy

Answer & Explanation
Microphone

47.  The process by which sunlight reaches to earth--..

Answer & Explanation
Radiation

48.  In a Filament type Light bulb most of the electric power consumed appear as

Answer & Explanation
Infrared rays

49.  Noise is measure in?

Answer & Explanation
Desible

50.  The Permissible noise level at Residential area during time is

Answer & Explanation
45dB

51.  The range of frequency of ultrasonic wave.

Answer & Explanation
Greater than 20 KHz

52.  The use of Decibel unit is ----

Answer & Explanation
Intensity of sound

53.  What is Decibel?

Answer & Explanation
Scale of sound level

54.  Wavelength of visible spectrum is -

Answer & Explanation
3900 A0 - 7600 A0

55.  X-rays are ----------.. waves.

Answer & Explanation
Electromagnetic

56.  Which scale is used to measure the intensity of earthquake?

Answer & Explanation
Richter

57.  The Unit of noise pollution (level) is

Answer & Explanation
decibel

58.  Supersonic air plane creates a shock wave called

Answer & Explanation
Sonic Boom

59.  Cryogenic Science is related to -

Answer & Explanation
Lower temperature

60.  The Hottest part of Gas Flame is known as - [

Answer & Explanation
Non-luminous zone
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