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The following question based on light, heat, thermodynamics, wave motion, sound, optics & oscillations topic of general science mcq
List I | List II |
A. Isothermal process | 1. Volume of the system remains constant |
B. Adiabatic process | 2. Pressure of the system remains constant |
C. Isobaric process | 3. Temperature of the system remains constant |
D. Isochoric process | 4. No heat transfer takes place between the system and the surrounding |
(a) A – 3, B – 4, C – 2, D – 1
(b) A – 2, B – 3, C – 4, D – 1
(c) A – 2, B – 1, C – 4, D – 3
(d) A – 4, B – 3, C – 1, D – 2
The correct answers to the above question in:
Answer: (a)
Practice light, heat, thermodynamics, wave motion, sound, optics & oscillations (set 14) Online Quiz
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Read more light heat thermodynamics wave sound optics oscillation Based General Science Questions and Answers
Question : 1
On a specific day and time, the temperature was 48ºC in Churu and 24ºC in Shimla. Two metallic cups identical in all respects contained water at 95ºC in Churu and 71ºC in Shimla. Which one of these two cups reached room temperature first?
a) Cup in Shimla
b) Both cups reached room temperature at the same time
c) Cup in Churu
d) Data are not enough to find out result
Answer »Answer: (b)
Question : 2
Consider the following statements :
- 1 gram of water at 100°C and 1 gram of steam at 100°C contain same amount of heat.
- 1 m3 of dry air is heavier than 1 m3 of humid air.
- Density of a substance in C.G.S. system is numerically equal to its specific gravity.
a) 1 and 3
b) 3 only
c) 1 only
d) 2 and 3
Answer »Answer: (b)
(1) 1 gram of steam at 100°C contains greater amount of heat in comparison to 1 gram of water at 100°C. Thus, statement (1) is incorrect.
(2) 1 m3 of humid air is heavier than 1m3 of dry air. Thus, statement (2) is incorrect.
(3) Density of a substance in C.G.S. system is numerically equal to its specific gravity. Thus, statement (3) is correct.
Question : 3
The marching soldiers break steps while crossing a bridge because of
a) echo
b) damped oscillations
c) resonance
d) reverberation
Answer »Answer: (c)
Question : 4
Wireless communication is reflected back to the Earth’s surface by the
a) Ionosphere
b) Stratosphere
c) Troposphere
d) Exosphere
Answer »Answer: (a)
Question : 5
The regions of compressions and rarefractions of sound wave are·establisbed because
a) the reflected sound wave at fixed end interferes with the incident wave
b) the sound wave undergoes diffraction behind obstacles
c) the longitudinal movement of air molecules produce pressure fluctuations
d) the speed of the sound wave changes as it travels through a medium
Answer »Answer: (c)
Question : 6
The frequency of a wave travelling at a speed of 500 ms–1 is 25Hz. Its time period is
a) 25 s
b) 20 s
c) 0.05 s
d) 0.04 s
Answer »Answer: (d)
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