1
NDA 2018 Paper 1
MCQ (Single Correct Answer)
+2.5
-0.83
Which of the following statement(s) about electromagnetic waves, sound waves and water waves is/are correct?

1. They exhibit reflection.

2. They carry energy.

3. They exert pressure.

4. They can travel in vacuum.
A
1, 2 and 3
B
2 and 4
C
1 and 3
D
Only 1
2
NDA 2018 Paper 1
MCQ (Single Correct Answer)
+2.5
-0.83
Thermal capacity of a body depends on the
A
mass of the body only
B
mass and shape of the body only
C
density of the body
D
mass, shape and temperature of the body
3
NDA 2018 Paper 1
MCQ (Single Correct Answer)
+2.5
-0.83
Which one of the following metal is used in the filaments of photoelectric cells that converts light energy into electric energy?
A
Tungsten
B
Copper
C
Rubidium
D
Aluminium
4
NDA 2019 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
A thin disc and a thin ring, both have mass M and radius R. Both rotate about axes through their centre of mass and are perpendicular to their surfaces at the same angular velocity. Which one of the following statements is correct?
A
The ring has higher kinetic energy.
B
The disc has higher kinetic energy.
C
The ring and the disc both have the same kinetic energy.
D
Kinetic energies of both the bodies are zero, since they are not in linear motion.
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