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The following question based on light, heat, thermodynamics, wave motion, sound, optics & oscillations topic of general science mcq
(a) Density gradient
(b) Uniform density
(c) Temperature gradient
(d) Uniform temperature
The correct answers to the above question in:
Answer: (c)
As heat flows from higher temperature to lower temperature, so a temperature gradient is required.
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Read more light heat thermodynamics wave sound optics oscillation Based General Science Questions and Answers
Question : 1
If the door of a running refrigerator in a closed room is kept open, what will be the net effect on the room?
a) It will heat the room
b) It will cool the room
c) It will make no difference on the average
d) It will make the temperature go up and down
Answer »Answer: (a)
Question : 2
Thermostat ...... is a mean of Keeping Stable.
a) Temperature
b) Pressure
c) Current
d) Heat Radiation
Answer »Answer: (a)
Question : 3
In the visible spectrum, the colour having the shortest wavelength is
a) Blue
b) Yellow
c) Red
d) Violet
Answer »Answer: (d)
Question : 4
Strips of two metals A and B are firmly joined together as shown in the figure. On heating, A expands more than B does. If this jointed strip is heated, then it will appear as
a) Figure a
b) Figure b
c) Figure c
d) Figure d
Answer »Answer: (a)
Question : 5
Red light signal is used as a danger signal because
a) It produces least chemical reaction
b) This is comfortable for eyes
c) Red light is scattered least
d) It is least absorbed in air
Answer »Answer: (c)
Question : 6
Which one among the following denotes the smallest temperature?
a) 1° on the Kelvin scale
b) 1° on the Celsius scale
c) 1° on the Fahrenheit scale
d) 1° on the Reaumur scale
Answer »Answer: (a)
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