1
NDA 2017 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
A rainbow is produced due to which one of the following phenomena?
A
Dispersion of light
B
Interference of light
C
Diffraction of light
D
Scattering of light by atmospheric dust
2
NDA 2017 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
Bats detect obstacles in their path by receiving the reflected
A
infrasonic waves
B
ultrasonic waves
C
radio waves
D
microwaves
3
NDA 2017 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
The statement that 'heat cannot flow by itself from a body at a lower temperature to a body at a higher temperature', is known as
A
zeroth law of thermodynamics
B
first law of thermodynamics
C
second law of thermodynamics
D
third law of thermodynamics
4
NDA 2017 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
Which one of the following wave does not belong to the category of the other three?
A
X-rays
B
Microwaves
C
Radiowaves
D
Sound waves
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