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The following question based on light, heat, thermodynamics, wave motion, sound, optics & oscillations topic of general science mcq
(a) Sugar in urine
(b) Sound in atmosphere
(c) Haemoglobin in blood
(d) Particles in air
The correct answers to the above question in:
Answer: (b)
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Read more light heat thermodynamics wave sound optics oscillation Based General Science Questions and Answers
Question : 1
The sprinkling of water slightly reduces the temperature of a closed room because
a) water has large latent heat of vaporisation
b) temperature of water is less than that of the room
c) specific heat of water is high
d) water is a bad conductor of heat
Answer »Answer: (a)
Question : 2
Which one among the following denotes the smallest temperature?
a) 1° on the Kelvin scale
b) 1° on the Celsius scale
c) 1° on the Fahrenheit scale
d) 1° on the Reaumur scale
Answer »Answer: (a)
Question : 3
Red light signal is used as a danger signal because
a) It produces least chemical reaction
b) This is comfortable for eyes
c) Red light is scattered least
d) It is least absorbed in air
Answer »Answer: (c)
Question : 4
Consider the following statements.
- Fibre optics is based on the principle of total internal reflection.
- In an optical fibre communication system, power consumption is extremely low.
- Optical fibre communications are free from radio frequency interference.
- In India, Reliance Group of Industries is engaged in the manufacture of the optical fibre.
a) 1, 3 and 4
b) 1, 2 and 4
c) 1, 2 and 3
d) 2, 3 and 4
Answer »Answer: (c)
Question : 5
The velocity of sound in any gas depends upon
a) intensity of sound waves only
b) wavelength of sound only
c) density and elasticity of gas
d) amplitude and frequency of sound
Answer »Answer: (c)
Velocity of sound in any gas depends upon density and elasticity of gas.
Question : 6
Two astronauts cannot hear each other on the Moon’s surface, because
a) No atmosphere on the Moon
b) They wear special space suits on the Moon
c) Their ears have stopped working on the Moon
d) The sound travels much more slowly on Moon
Answer »Answer: (a)
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