A Best Way To Crack Gorenment Job Exams

General Knowledge Objective Questions { Physics }

85. Electrostatic precipitator is used to control the pollution of?

86. Tungsten is used for the manufacture of the filament of an electric bulb, because?
A.It is a good conductor
B.It is economical
C.It is malleable
D.It has a very high melting point

87. What is the wavelength of visible spectrum?
A.1300 g-3000 A?
B.3900 A? - 7600 A?
C.7800 A? - 8000 A?
D.8500 - 9800 A?

88. Who measured the velocity of light first?

89. When a vehicle passes, TV reception gets distorted. This is because?
A.Metal reflects radio waves
B.spark plug creates electromagnetic disturbances
C.vehicle pollution affects the performance of the 'IV components
D.modern vehicles use electro ignition system

90. The energy emitted by the Sun is due to?
A.Chemical reaction
B.Nuclear fission
C.Nuclear fusion
D.All of the above

91. The sky appears blue because of?
A.Atmospheric water vapour
B.Scattering of light
C.Reflection on sea water
D.Emission of blue wavelength by the sun

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