CDS Exam (II)- 2025 - General Knowledge Defence Question Paper

CDS Previous Year Question Papers Question Papers
CDS Exam (II)- 2025 - General Knowledge

CDS Exam (II)- 2025 - General Knowledge Defence Questions

21.
The rule to determine the direction of a current induced in a coil due to its rotation in a magnetic field is:
A.
Right-Hand Thumb Rule.
B.
Fleming's Left-Hand Rule.
C.
Fleming's Right-Hand Rule.
D.
Hund's Rule.
😑 View Answer Error
ANSWER :
C. Fleming's Right-Hand Rule.
22.
A car travels a total distance L. It travels half the distance with speed \( v_{1} \) and the other half with speed \( v_{2} \). The average speed of the car is:
A.
\( \frac{v_{1} + v_{2}}{2} \)
B.
\( \frac{2v_{1}v_{2}}{v_{1} + v_{2}} \)
C.
\( \frac{\left(v_{1} + v_{2}\right)L}{2v_{1}v_{2}} \)
D.
0
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ANSWER :
B. \( \frac{2v_{1}v_{2}}{v_{1} + v_{2}} \)
23.
The linear momentum of a particle is conserved if:
A.
the net force on it is maximum.
B.
the net force on it is zero.
C.
the net torque on it is zero.
D.
the net work done on it is maximum.
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ANSWER :
B. the net force on it is zero.
24.
When a stone tied to a string is whirled in a circle, the work done on it by the string:
A.
is positive.
B.
is negative.
C.
is zero.
D.
depends on the mass of the stone.
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ANSWER :
C. is zero.
25.
Assume 'A' does 500 J of work in 'x' minutes and 'B' does 1000 J of work in 20 minutes. If the power delivered by 'A' is \( P_{1} \) and 'B' is \( P_{2} \) and \( P_{1} = 2P_{2} \), then 'x', in minutes is:
A.
10
B.
5
C.
20
D.
25
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ANSWER :
B. 5
26.
A sound wave travelling at a speed of 330 m/s produces 20 crests and 20 troughs in 0.1 second. The wavelength of the sound wave is:
A.
1.1 m
B.
3.3 m
C.
1.65 m
D.
2.2 m
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ANSWER :
C. 1.65 m
27.
An X-ray can be deflected:
A.
by a magnetic field.
B.
by an electric field.
C.
by both electric and magnetic field.
D.
neither by electric field nor by magnetic field.
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ANSWER :
D. neither by electric field nor by magnetic field.
28.
In a simple astronomical telescope, the objective and the eyepiece used respectively, are:
A.
a convergent lens and a divergent lens.
B.
a divergent lens and a divergent lens.
C.
a divergent lens and a convergent lens.
D.
a convergent lens and a convergent lens.
😑 View Answer Error
ANSWER :
D. a convergent lens and a convergent lens.
29.
Twinkling of a star is due to:
A.
Interference of light
B.
Refraction of light
C.
Polarization of light
D.
Diffraction of light
😑 View Answer Error
ANSWER :
B. Refraction of light
30.
Van de Graaff generator generates:
A.
low voltage high direct current
B.
magnetic field
C.
high voltage low alternating current
D.
high voltage low direct current
😑 View Answer Error
ANSWER :
D. high voltage low direct current
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