1
NDA 2019 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
Radiations coming from the sun are mostly in the form of
A
light only
B
light and long wavelength infrared
C
light and short wavelength infrared
D
Both short and long wavelength infrared
2
NDA 2019 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
Which of the following are the characteristics of electromagnetic waves ?

1. They are elastic waves.

2. They can also move in vacuum.

3. They have electric and magnetic components which are mutually perpendicular.

4. They move with a speed equal to 3 lakh meters per second.

Select the correct answer using the codes given below.
A
1, 2, 3 and 4
B
1, 2 and 4
C
2 and 3
D
3 and 4
3
NDA 2019 Paper 1
MCQ (Single Correct Answer)
+2.5
-0.83
The light energy escaping from the sun can be spread by
A
a shower of rain drops
B
a plane mirror
C
a convex lens
D
a combination of a convex lens and a concave lens
4
NDA 2019 Paper 1
MCQ (Single Correct Answer)
+2.5
-0.83
The correct sequence of energy transfer that occurs when an apple falls to the ground is
A
gravitational potential energy $$\to$$ heat energy to air $$\to$$ kinetic energy $$\to$$ heat energy to ground and apple $$\to$$ sound energy
B
gravitational potential energy $$\to$$ sound energy $$\to$$ kinetic energy $$\to$$heat energy to air $$\to$$ heat energy to ground and apple
C
gravitational potential energy $$\to$$ kinetic energy $$\to$$ heat energy to air $$\to$$ heat energy to ground and apple $$\to$$sound energy
D
gravitational potential energy $$\to$$kinetic energy $$\to$$ sound energy $$\to$$ heat energy to air $$\to$$ heat energy to ground and apple
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