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question_answer1)
In ____ sound waves do not travel.
A)
Solids done
clear
B)
Liquids done
clear
C)
Vacuum done
clear
D)
Gases done
clear
E)
None of these done
clear
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question_answer2)
How does a bat find its food?
A)
Through the smell of the food. done
clear
B)
Through its eyes. done
clear
C)
With the help of sound waves. done
clear
D)
All the above done
clear
E)
None of these done
clear
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question_answer3)
Which among the following is correct?
A)
Sound do not need a medium to travel. done
clear
B)
Speed of sound is more than that of light. done
clear
C)
Sound can travel in air. done
clear
D)
We can hear a sound produced on moon. done
clear
E)
None of these done
clear
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question_answer4)
Light travels in a ____ path.
A)
Circular done
clear
B)
Triangular done
clear
C)
Straight done
clear
D)
Concentric done
clear
E)
None of these done
clear
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question_answer5)
In which of the following sound will be produced?
A)
When we hit a table with pen. done
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B)
When we beat the drum with stick. done
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C)
When we speak loudly. done
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D)
All the above done
clear
E)
None of these done
clear
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question_answer6)
Waves which ranges from 20 hz to 20,000 hz:
A)
Cannot be heard by human beings. done
clear
B)
Is hearing range for human beings. done
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C)
Hearing range of bat. done
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D)
Hearing range of dolphins. done
clear
E)
None of these done
clear
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question_answer7)
____ objects gives out light.
A)
Luminous done
clear
B)
Non-luminous done
clear
C)
Opaque done
clear
D)
Transparent done
clear
E)
None of these done
clear
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question_answer8)
Band of seven colours obtained through dispersion is called:
A)
Reflection done
clear
B)
Refraction done
clear
C)
Spectrum done
clear
D)
Transparency done
clear
E)
None of these done
clear
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question_answer9)
Bouncing off light rays after striking a surface is known as ___.
A)
Spectrum done
clear
B)
Dispersion done
clear
C)
Reflection done
clear
D)
Refraction done
clear
E)
None of these done
clear
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question_answer10)
Smoked glass is an example of:
A)
Transparent object done
clear
B)
Translucent object done
clear
C)
Opaque object done
clear
D)
All the above done
clear
E)
None of these done
clear
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question_answer11)
Which among the following is not a transparent object?
A)
Cellophane done
clear
B)
Glass done
clear
C)
Frosted glass done
clear
D)
Diamond done
clear
E)
None of these done
clear
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question_answer12)
According to the law of reflection, if angle of incidence is 40° then angle of reflection is:
A)
\[30{}^\circ \] done
clear
B)
\[38{}^\circ \] done
clear
C)
\[40{}^\circ \] done
clear
D)
\[50{}^\circ \] done
clear
E)
None of these done
clear
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question_answer13)
How many colours are there in white light?
A)
5 done
clear
B)
0 done
clear
C)
7 done
clear
D)
8 done
clear
E)
None of these done
clear
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question_answer14)
Splitting of white light into seven colours on passing through a prism is called:
A)
Spectrum done
clear
B)
Dispersion done
clear
C)
Reflection done
clear
D)
Refraction done
clear
E)
None of these done
clear
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question_answer15)
A shadow is formed on the ______ side of the light source.
A)
Opposite done
clear
B)
Both done
clear
C)
Same done
clear
D)
Either [a] or [b] done
clear
E)
None of these done
clear
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question_answer16)
Which among the following is correct?
A)
White light is a combination of seven colours. done
clear
B)
Light always travel in a straight line. done
clear
C)
Light can travel in vacuum. done
clear
D)
All the above done
clear
E)
None of these done
clear
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question_answer17)
Which phenomenon is shown in the given figure.
A)
Reflection done
clear
B)
Dispersion done
clear
C)
Diffused reflection done
clear
D)
All the above done
clear
E)
None of these done
clear
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question_answer18)
In a thunderstorm light reaches first to the earth's surface than sound because:
A)
Speed of sound is equal to speed of light. done
clear
B)
Speed of light is much more than the speed of sound. done
clear
C)
Speed of sound is more than speed of light. done
clear
D)
All the above done
clear
E)
None of these done
clear
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question_answer19)
Which among the following colours is not constituent colour of white light?
A)
Violet done
clear
B)
Green done
clear
C)
Black done
clear
D)
Red done
clear
E)
None of these done
clear
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question_answer20)
If we see an image of a flying bird on the surface of water then the reflecting surface is:
A)
Water surface done
clear
B)
Bird done
clear
C)
Both [a] and [b] done
clear
D)
Either [a] or [b] done
clear
E)
None of these done
clear
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question_answer21)
When you are wearing a yellow coloured dress then the colour of your shadow will be:
A)
Yellow done
clear
B)
Red done
clear
C)
Black done
clear
D)
Brown done
clear
E)
None of these done
clear
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question_answer22)
Shadows are long during:
A)
Early morning done
clear
B)
Evening done
clear
C)
Both [a] and [b] done
clear
D)
Afternoon done
clear
E)
None of these done
clear
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question_answer23)
Which type of source of light is needed for a shadow to form?
A)
Opaque done
clear
B)
Transparent done
clear
C)
Both [a] and [b] done
clear
D)
Either [a] or [b] done
clear
E)
None of these done
clear
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question_answer24)
???? is formed when opaque object comes in between light source and the screen.
A)
Cloud done
clear
B)
Image done
clear
C)
Shadow done
clear
D)
Rainbow done
clear
E)
None of these done
clear
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question_answer25)
Water is a ____ object.
A)
Translucent object done
clear
B)
Transparent object done
clear
C)
Opaque object done
clear
D)
Luminous object done
clear
E)
None of these done
clear
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question_answer26)
Match the following:
Column A | Column B |
i. Luminous object | A. Book |
ii. Non-luminous object | B. Burning candle |
iii. Transparent object | C. Butter paper |
iv. Translucent object | D. Glass |
A)
(i - B), (ii - D), (iii - A), (iv - C) done
clear
B)
(i - C), (ii - B), (iii - A), (iv - D) done
clear
C)
(i - D), (ii - C), (iii - A), (iv - B) done
clear
D)
(i - B), (ii - A), (iii - D), (iv - C) done
clear
E)
None of these done
clear
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question_answer27)
Which among the following is required in the formation of a shadow?
A)
Source of light done
clear
B)
Screen on which shadow is formed done
clear
C)
An opaque object done
clear
D)
All the above done
clear
E)
None of these done
clear
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question_answer28)
Which branch of science can tell us about dispersion of light?
A)
Zoology done
clear
B)
Optics done
clear
C)
Acoustics done
clear
D)
Geology done
clear
E)
None of these done
clear
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question_answer29)
Which part of eye acts like a screen, on which image is formed?
A)
Cornea done
clear
B)
Iris done
clear
C)
Retina done
clear
D)
Lens done
clear
E)
None of these done
clear
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question_answer30)
Which one of the following is not an opaque object?
A)
Mud done
clear
B)
Wood done
clear
C)
Ground glass done
clear
D)
Mirror done
clear
E)
None of these done
clear
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question_answer31)
Which among the following is an opaque object?
A)
Wooden screen done
clear
B)
Chart paper done
clear
C)
Sunglasses done
clear
D)
Both [a] and [b] done
clear
E)
None of these done
clear
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question_answer32)
Which among the following is not correct about image formed by a plane mirror?
A)
Size of the object and its image is same. done
clear
B)
Image is formed behind the mirror. done
clear
C)
Image formed is inverted. done
clear
D)
All the above done
clear
E)
None of these done
clear
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question_answer33)
Which of the following factors affect the speed of sound?
A)
Temperature done
clear
B)
Medium of travelling done
clear
C)
Humidity done
clear
D)
All the above done
clear
E)
None of these done
clear
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question_answer34)
Sound coming from the place where a traffic jam happens?
A)
Noise. done
clear
B)
Silence done
clear
C)
Music done
clear
D)
Buzz done
clear
E)
None of these done
clear
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question_answer35)
Unit of measuring sound is:
A)
Newton done
clear
B)
Decibel done
clear
C)
Hertz done
clear
D)
Metre done
clear
E)
None of these done
clear
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question_answer36)
our _____ helps us to produce sound.
A)
skin done
clear
B)
Nose done
clear
C)
Ear done
clear
D)
Vocal cords done
clear
E)
None of these done
clear
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question_answer37)
The branch of science that deals with the study of sound?
A)
Biology done
clear
B)
Acoustics done
clear
C)
Optics done
clear
D)
Ornithology done
clear
E)
None of these done
clear
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question_answer38)
The materials through which some amount of light can pass are called:
A)
Opaque materials done
clear
B)
Transparent materials done
clear
C)
Translucent materials done
clear
D)
Luminous materials done
clear
E)
None of these done
clear
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question_answer39)
Air blown into a flute produces sound due to:
A)
Vacuum produced in the flute done
clear
B)
Cooling of air done
clear
C)
Vibration of air done
clear
D)
Heating of air done
clear
E)
None of these done
clear
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question_answer40)
Loud and unpleasant sound is called ____.
A)
Music done
clear
B)
Silence done
clear
C)
Noise done
clear
D)
Chirping done
clear
E)
None of these done
clear
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