1
NDA General Ability 18 April 2021
MCQ (Single Correct Answer)
+4
-1.33
Change Language
Which one of the following conclusions could not be derived from Rutherford's α-particle scattering experiment? 
A
Most of the space in the atom is empty
B
The radius of the atom is about 105 times the radius of the nucleus
C
Electrons move in a circular path of fixed energy called orbits
D
Nearby all the mass of the atom resides in the nucleus
2
NDA General Ability 18 April 2021
MCQ (Single Correct Answer)
+4
-1.33
Change Language
Twinkling of stars is due to
A
Particular frequencies of the starlight
B
reflection of starlight from the oceanic surface
C
atmospheric refraction of starlight
D
magnetic field of Earth
3
NDA General Ability 18 April 2021
MCQ (Single Correct Answer)
+4
-1.33
Change Language
Which one of the following cannot be the unit of frequency of a sound wave?
A
dB
B
s-1
C
Hz
D
min-1
4
NDA General Ability 18 April 2021
MCQ (Single Correct Answer)
+4
-1.33
Change Language
'Beats' is a phenomenon that occurs when frequencies of two harmonic waves are
A
equal
B
far apart
C
multiples of each other
D
nearly same
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