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

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

Comment

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

Comment

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

Comment

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

Comment

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

Comment

Answer: Option [C]

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