1
NDA 2017 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
Step-up transformers are used for
A
increasing electrical power
B
decreasing electrical power
C
decreasing voltage
D
increasing voltage
2
NDA 2017 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
Which one among the following waves carries the maximum energy per photon?
A
X-rays
B
Radio waves
C
Light waves
D
Microwaves
3
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
4
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
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