1
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.
2
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.
3
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.
4
NDA General Ability 16 April 2023
MCQ (Single Correct Answer)
+4
-1.33
Change Language
Mica is mainly used in:
A
food and beverage industry.
B
iron and steel industry.
C
aluminium industry.
D
electrical and electronic industries.
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