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The following question based on light, heat, thermodynamics, wave motion, sound, optics & oscillations topic of general science mcq
- Light of longer wavelength is scattered much more than the light of shorter wavelength.
- The speed of visible light in water is 0.95 times the speed in vacuum.
- Radio waves are produced by rapidly oscillating electrical currents.
- To detect the overspeeding vehicles, police use the Doppler effect of reflected short radio waves.
(a) 2 and 4
(b) 1 and 3
(c) 1 and 2
(d) 3 and 4
The correct answers to the above question in:
Answer: (d)
Discuss Form
Read more light heat thermodynamics wave sound optics oscillation Based General Science Questions and Answers
Question : 1
The Sun and the Moon appear elliptical near the horizon because of
a) Interference phenomenon
b) Optical illusion
c) Refraction
d) Their actual shape
Answer »Answer: (c)
Question : 3
Which one of the following statements is not correct?
a) The velocity of sound in air is independent of pressure
b) The velocity of sound in air decreases as the humidity increases
c) The velocity of sound in air increases with the increase of temperature
d) The velocity of sound in air is not affected by the change in amplitude and frequency
Answer »Answer: (b)
Question : 4
Assertion (A):
Large cold storage plants use ammonia as refrigerant while domestic refrigerators use chlorofluorocarbons.
Reason (R):
Ammonia can be liquefied at ambient temperatures at low pressures.
Code
a) Both (A) and (R) are true, but (R) is not the correct explanation of (A)
b) (A) is true, but (R) is false
c) Both (A) and (R) are true and (R) is the correct explanation of (A)
d) (A) is false, but (R) is true
Answer »Answer: (b)
Question : 5
The focusing in the eye is done by
a) To and fro movement of the retina
b) To and fro movement of the lens
c) Change in the convexity of the lens
d) Change in the refractive index of the eye fluid
Answer »Answer: (c)
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