1
NDA 2017 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
How long does light take to reach the earth from the sun?
A
About 4 min
B
About 8 min
C
About 24 min
D
About 24 h
2
NDA 2017 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
Radioactivity is measured by
A
GM counter
B
polarimeter
C
calorimeter
D
colorimeter
3
NDA 2017 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
The mirrors used as rear-view mirrors in vehicles are
A
concave
B
convex
C
cylindrical
D
plane
4
NDA 2017 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
Which one of the following waves is used for detecting forgery in currency notes?
A
Ultraviolet waves
B
Infrared waves
C
Radio waves
D
Microwaves
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