1
NDA General Ability 16 April 2023
MCQ (Single Correct Answer)
+4
-1.33
Change Language
A railway wagon (open at the top) of mass M1 is moving with speed v1 along a straight track. As a result of rain, after some time it gets partially filled with water so that the mass of the wagon becomes M2 and speed becomes v2. Taking the rain to be falling vertically and the water stationery inside the wagon, the relation between the two speeds v1 and v2 is :
A
v1 = v2
B
$\frac{1}{2}$M1$v^2_1$ < $\frac{1}{2}$ M2$v^2_2$
C
M1v1 = M2v2
D
M1v1 < M2v2
2
NDA General Ability 16 April 2023
MCQ (Single Correct Answer)
+4
-1.33
Change Language
Which one of the following statements is not true for a flute, a musical instrument?
A
Momentum of waves on the blowing jet determines the loudness of the produced note.
B
Arrival time of the waves on the blowing jet determines the pitch of the produced note.
C
Sound comes from a vibrating column of air inside the flute.
D
Sound comes from a vibrating column of air inside as well as outside the flute.
3
NDA General Ability 16 April 2023
MCQ (Single Correct Answer)
+4
-1.33
Change Language
A positive charge is moving towards south in a space where magnetic field is pointing in the north direction. The moving charge will experience :
A
a deflecting force towards north direction.
B
a deflecting force towards east direction.
C
a deflecting force towards west direction.
D
no deflecting force.
4
NDA General Ability 16 April 2023
MCQ (Single Correct Answer)
+4
-1.33
Change Language
Which one of the following statements about X-rays is not true?
A
They have wavelengths of about 1 Å.
B
These can be generated by bombarding a metal target by high energy electrons.
C
Due to their wavelengths being shorter, these can be used for radar systems.
D
These are also used for the treatment of certain forms of cancer.
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