1
NDA 2018 Paper 1
MCQ (Single Correct Answer)
+2.5
-0.83
Two convex lenses with power 2D are kept in contact with each other. The focal length of the combined lens system is
A
0.10 m
B
2 m
C
4 m
D
0.25 m
2
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
3
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
4
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
EXAM MAP
Medical
NEETAIIMS
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
Civil Services
UPSC Civil Service
Defence
NDA
Staff Selection Commission
SSC CGL Tier I
CBSE
Class 12