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The following question based on light, heat, thermodynamics, wave motion, sound, optics & oscillations topic of general science mcq
(a) has a property that varies with temperature
(b) has property that varies linearly with temperature
(c) remains liquid over the entire range of temperatures to be measured
(d) obey Boyle’s law
The correct answers to the above question in:
Answer: (a)
The temperature is measured by the value of the thermodynamic property of a substance.
i.e., the property which varies linearly with the temperature.
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Read more light heat thermodynamics wave sound optics oscillation Based General Science Questions and Answers
Question : 1
If a liquid is heated in condition of weightlessness, the heat is transmitted through
a) radiation
b) conduction
c) convection
d) None, because the liquid cannot be heated in weightlessness
Answer »Answer: (b)
Convection is not possible in weightlessness. So the liquid will be heated through conduction.
Question : 2
A cut diamond shines brilliantly due to
a) Its molecular structure
b) Total internal reflection
c) Some inherent property
d) Absorption of light
Answer »Answer: (b)
Question : 3
Consider the following statements :
- Bells are made of metal and not of wood because the sound is not conducted by metals but is radiated.
- The rate of transfer of energy in a wave depends directly on the square of the wave amplitude and square of the wave frequency.
a) 1 and 2 both
b) 1 only
c) 2 only
d) None
Answer »Answer: (c)
Metal is a good conductor of sound because it is solid and hence it has atoms are very near, this causes more vibration required for conducting sound.
Question : 4
‘Endoscope’ used by the doctors for examining the inside of patient’s stomach, works on the principle of
a) Refraction of light
b) Dispersion of light
c) Reflection of light
d) Total internal reflection of light
Answer »Answer: (d)
Question : 5
A child is standing in front of a magic mirror. She finds the image of her head bigger, the middle portion of her body of the same size and that of the legs smaller. The following is the order of combinations for the magic mirror from the top.
a) Concave, plane and convex
b) Plane, convex and concave
c) Convex, concave and plane
d) Convex, plane and concave
Answer »Answer: (a)
Question : 6
What is the decibel level of sound produced by two persons in conversation?
a) About 10 decibel
b) About 30 decibel
c) About 5 decibel
d) About 100 decibel
Answer »Answer: (b)
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