1
NDA General Ability 4 September 2022
MCQ (Single Correct Answer)
+4
-1.33
Change Language
A bullet of mass 10 g is horizontally fired with velocity 300 m s-1 from a pistol of mass 1 kg. What is the recoil velocity of the pistol?
A
0.3 m s-1
B
m s-1
C
-3 m s-1
D
-0.3 m s-1
2
NDA General Ability 4 September 2022
MCQ (Single Correct Answer)
+4
-1.33
Change Language
A microphone converts
A
electrical signals to sound waves
B
sound waves to electrical signals
C
microwaves to sound waves
D
sound waves to microwaves
3
NDA General Ability 10 April 2022
MCQ (Single Correct Answer)
+4
-1.33
Change Language

Inhabitants are unaware of the speed of rotation of the planet Earth because

1. the angular velocity is constant for each place on the Earth's surface

2. the atmosphere rotates with the Earth

3. there are no nearby objects, either stationary or moving at a rate different from that of the Earth

Which of the above is/are the correct explanation(s)?
A
1 only
B
1 and 2 only
C
2 and 3 only
D
1, 2 and 3
4
NDA General Ability 10 April 2022
MCQ (Single Correct Answer)
+4
-1.33
Change Language
The twinkling of a star is due to the atmospheric
A
diffraction of starlight
B
reflection of starlight
C
refraction of starlight
D
Scattering of starlight
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