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The following question based on light, heat, thermodynamics, wave motion, sound, optics & oscillations topic of general science mcq
(a) Blue
(b) Yellow
(c) Green
(d) Red
The correct answers to the above question in:
Answer: (d)
Practice light, heat, thermodynamics, wave motion, sound, optics & oscillations (set 15) Online Quiz
Discuss Form
Read more light heat thermodynamics wave sound optics oscillation Based General Science Questions and Answers
Question : 1
A well cut diamond appears bright because
a) of the total internal reflection
b) of reflection of light
c) of dispersion of light
d) of refraction of light
Answer »Answer: (a)
Question : 2
Long radio waves are reflected by which of the following layer of Earth’s surface?
a) Tropopause
b) Ionosphere
c) Troposphere
d) Stratosphere
Answer »Answer: (b)
Question : 3
What is the use of thermostat?
a) To increase the temperature
b) To maintain the temperature
c) To measure the temperature
d) To convert heat into electricity
Answer »Answer: (b)
Question : 4
Assertion (A):
A jet aircraft moving at mach number equal to 1 travels faster at an altitude of 15 km than while moving at mach number equal to 1 near the sea level.
Reason (R):
The velocity of sound depends on the temperature of the surrounding medium.
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: (d)
Question : 5
In the night wind blows fast, dew is not formed because
a) Moisture in air is low
b) Temperature is high
c) Rate of evaporation is fast
d) Sky is not clear
Answer »Answer: (c)
Question : 6
The technique used to transmit auto signals in television broadcasts is
a) Pulse Code Modulation
b) Frequency Modulation
c) Amplitude Modulation
d) Time Division Multiplexing
Answer »Answer: (b)
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