Physics - General Science Objective Questions and Answers | General Awareness for Competitive Exams

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Questions
26 Decibel unit is used to measure :
A speed of light
B intensity of heat
C intensity of sound
D radio wave frequency

Answer: Option [C]
27 Which atmospheric layer helps in radio transmission ?
A Ozonosphere
B Ionosphere
C Stratosphere
D Mesosphere

Answer: Option [B]
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28 Kilowatt-hour(KWh) unit is used to measure :
A Power
B Energy
C Electric charge
D Electric current

Answer: Option [B]
29 Golden view of sea shell is due to :
A Diffraction
B Reflection
C Refraction
D Polarization

Answer: Option [D]
30 The 'Greenhouse effect' is mainly due to increase in atmospheric :
A Ozone
B Nitrogen
C Carbon dioxide
D Carbon monoxide

Answer: Option [C]

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