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The following question based on light, heat, thermodynamics, wave motion, sound, optics & oscillations topic of general science mcq
Reveraberation mainly feels in large churches and in other large buildings.
Reason (R):
The walls, roof and ground may cause multiple sound reflections.
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
The correct answers to the above question in:
Answer: (c)
Discuss Form
Read more light heat thermodynamics wave sound optics oscillation Based General Science Questions and Answers
Question : 1
The correct order of colours in a rainbow is
a) Blue, yellow, green
b) Violet, green, blue
c) Blue, green, violet
d) Blue, green, yellow
Answer »Answer: (d)
Question : 2
The nature of radiation of light is
a) Like both of wave and particle
b) Like particle
c) Like wave
d) Like neither of wave nor of particle
Answer »Answer: (a)
Question : 3
A bimetallic strip consists of brass and iron. When it is heated it bends into an arc with brass on the convex and iron on the concave side of the arc. This happens because
a) it is easier to bend an iron strip than a brass strip of the same size
b) brass has a higher specific heat capacity than iron
c) density of brass is more than that of iron
d) brass has a higher coefficient of linear expansion than iron
Answer »Answer: (d)
It is so because brass has a higher coefficient of linear expansion.
Question : 4
Match the Column - I and Column - II
Column I | Column II |
A. Audible range in humans | P. greater than 20,000 Hz |
B. Ultrasonic waves | Q. 20 Hz – 20,000 Hz |
C. Infrasonic waves | R. 1498 m/s |
D. Speed of sound in water (distilled) | S. 343.2 m/s |
E. Speed of sound in air | T. less than 20 Hz |
a) A-Q; B-P; C-T; D-R; E-S
b) A-Q; B-P; C-T; D-S; E-R
c) A-P; B-Q; C-T; D-R; E-S
d) A-Q; B-T; C-P; D-R; E-S
Answer »Answer: (a)
Question : 5
_____ is the characteristic of a musical sound by which a loud sound can be distinguished from a faint sound even though both have the same pitch.
a) Quality
b) Loundness
c) Pitch
d) None of these
Answer »Answer: (b)
Question : 6
The minimum height of a plane mirror to see the full size image of a person is equal to
a) One-fourth the height of the person
b) Half the height of the person
c) The height of the person
d) Double the height of the person
Answer »Answer: (b)
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