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Question 1 PHY 102 | LAUTECH 100L
A
i,ii,iii  
B
ii,iii  
C
iii  
D
i,ii  
E
i  
Explanation.
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Correct Option:
C
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Question 2 PHY 102 | LAUTECH 100L
A
i,ii  
B
ii,iii  
C
i,ii,iii  
D
ii  
E
iii  
Explanation.
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Correct Option:
A
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Question 3 PHY 102 | LAUTECH 100L
A
i,ii,iii  
B
i  
C
ii,iii  
D
i  
E
iii  
Explanation.
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Correct Option:
B
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Question 5 PHY 102 | LAUTECH 100L
A
the velocity of sound in air is independent of the motion of the source  
B
the velocity of sound in air is dependent of the motion of the source  
C
the velocity of sound in air is equal to that of the motion of the source  
D
the velocity of sound in air is equal to zero  
E
none of the above  
Explanation.
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Correct Option:
E
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Question 6 PHY 102 | LAUTECH 100L
A
Refraction  
B
Interference  
C
Diffraction  
D
Polarization  
E
Photoelectric effect  
Explanation.
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Correct Option:
E
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Question 7 PHY 102 | LAUTECH 100L
A
can be diffracted  
B
can be polarized  
C
can be reflected  
D
travel faster in solid than in liquid  
E
travel in air  
Explanation.
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Correct Option:
B
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Question 8 PHY 102 | LAUTECH 100L
A
gamma-rays, ultraviolet rays, radio waves.  
B
gamma-rays, visible light, ultraviolet rays.  
C
visible light, infrared radiation, microwaves  
D
microwaves, ultraviolet rays, X-rays  
E
radio-waves, visible-light, infrared radiation  
Explanation.
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Correct Option:
C
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Question 9 PHY 102 | LAUTECH 100L
A
its frequency decreases and its velocity decreases  
B
its wavelength decreases and its velocity decreases  
C
its frequency increases and its velocity increases  
D
its wavelength increases and its velocity increases  
E
none of the above  
Explanation.
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Correct Option:
B
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Question 10 PHY 102 | LAUTECH 100L
A
50 
B
495 
C
660 
D
727 
E
7300 
Explanation.
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Correct Option:
B
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