set 2 MCQ Questions & Answers Detailed Explanation
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The following question based on light, heat, thermodynamics, wave motion, sound, optics & oscillations topic of general science mcq
(a) it will continue to go on the same path after refraction.
(b) it will bend towards the normal after refraction.
(c) it will bend away from the normal after refraction.
(d) it will refract making an angle of refraction = angle of incidence.
The correct answers to the above question in:
Answer: (d)
A ray of light traveling from optically denser to the optically rarer medium will bend away from the normal.
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Read more light heat thermodynamics wave sound optics oscillation Based General Science Questions and Answers
Question : 1
In an Earthen pitcher, the water remains cold due to the process of
a) Evaporation
b) Sublimation
c) Condensation
d) None of the above
Answer »Answer: (a)
Question : 2
Two identical piano wires have same fundamental frequency when kept under the same tension. What will happen if tension of one of the wire is slightly increased and both the wires are made to vibrate simultaneously?
a) Beats
b) Noise
c) Resonance
d) Non-linear effects
Answer »Answer: (c)
Question : 3
Consider the following statements.
- Steam at 100ºC and boiling water at 100ºC contain the same amount of heat.
- The latent heat of the fusion of ice is equal to the latent heat of the vaporization of water.
- In an air conditioner, heat is extracted from the room air at the evaporator coils and is ejected out at the condenser coils.
a) 2 and 3
b) Only 2
c) 1 and 2
d) Only 3
Answer »Answer: (d)
Question : 4
The reason of mirage is
a) Polarization of light
b) Diffraction of light
c) Interference of light
d) Total internal reflection of light
Answer »Answer: (d)
Question : 5
Cloudy nights are warmer compared to clear cloudless nights, because clouds
a) produce heat and radiate it towards earth
b) reflect back the heat given off by earth
c) prevent clod waves from the sky from descending on earth
d) absorb heat from the atmosphere and send it towards earth
Answer »Answer: (b)
Cloudy nights are warmer than clear nights because, the cloud cover provides a shield which act as an insulator and store up the heat radiated by the earth and do not permit heat to escape.
Question : 6
Ultrasonic waves have frequency
a) only above 20,000 Hz
b) below 20 Hz
c) between 20 and 20,000 Hz
d) only above 20,000 MHz
Answer »Answer: (a)
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