Physics · NDA previous year questions

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2025 45 questions

Q512025 · 14 Sept 2025
The focal length of a concave lens is 0.5 m. The power of the lens is
1. A.+0.5 D
2. B.-0.5 D
3. C.+2.0 D
4. D.-2.0 D
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Answer: D
Q522025 · 14 Sept 2025
The rule to determine the direction of a force experienced by a straight current carrying conductor placed in a magnetic field which is perpendicular to it is
1. A.Right-hand thumb rule
2. B.Fleming’s left-hand rule
3. C.Fleming’s right-hand rule
4. D.Hund’s rule
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Answer: B
Q542025 · 14 Sept 2025
Which one of the following statements for second law of motion is NOT correct ?
1. A.The net force on a body is proportional to that body’s acceleration
2. B.The net force on a body is in the same direction as the acceleration
3. C.The time rate of change of momentum is equal to force
4. D.The net force on a body is proportional to that body’s momentum
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Answer: D
Q552025 · 14 Sept 2025
The temperature of a body increases from 310 K to 340 K. The temperature increase in degree Celsius is
1. A.20°C
2. B.30°C
3. C.37°C
4. D.67°C
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Answer: B
Q562025 · 14 Sept 2025
Which one of the following statements for the work done by gravity on a body is NOT correct ?
1. A.Work done is independent of the path followed by the body
2. B.Work done depends only on the vertical distance separating the initial and the final position of the body
3. C.Work done depends on the path followed by the body
4. D.Work done is zero if the body is displaced horizontally to the force of gravity
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Answer: C
Q582025 · 14 Sept 2025
Which one of the following wavelength radiations may correspond to an X-ray ?
1. A.1 nm
2. B.10 nm
3. C.100 nm
4. D.300 nm
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Answer: A
Q592025 · 14 Sept 2025
In a Telescope, compared to the eyepiece lens the objective lens has
1. A.larger focal length and larger aperture
2. B.larger focal length and smaller aperture
3. C.smaller focal length and larger aperture
4. D.smaller focal length and smaller aperture
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Answer: A
Q602025 · 14 Sept 2025
The energy, E, of a photon can be expressed as E = hf where f is the frequency and h is Planck’s constant. The dimensions of h are the same as that of
1. A.linear momentum
2. B.angular momentum
3. C.displacement
4. D.torque
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Answer: B
Q612025 · 14 Sept 2025
The work done by the force acting on an object is zero if the displacement of the object
1. A.is in the opposite direction of the direction of force
2. B.is in the same direction of the direction of force
3. C.is in perpendicular direction of the direction of force
4. D.none of above
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Answer: C
Q622025 · 14 Sept 2025
The magnetic field inside a current carrying very long solenoid is
1. A.Uniform
2. B.Non-uniform
3. C.Zero
4. D.Highest at mid-point
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Answer: A
Q632025 · 14 Sept 2025
Which one of the following instruments can be used to measure —250°C temperature ?
1. A.By using a mercury based thermometer
2. B.By using an alcohol based thermometer
3. C.By using a clinical thermometer
4. D.By using thermocouple based thermometer
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Answer: D
Q642025 · 14 Sept 2025
The quantity of heat needed to change unit mass of a substance from liquid to vapour without changing the temperature, is called
1. A.specific heat
2. B.specific latent heat
3. C.thermal capacity
4. D.heat energy
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Answer: B
Q652025 · 14 Sept 2025
The temperature at which “vapour pressure of the liquid in an open vessel becomes equal to the atmospheric pressure” is called
1. A.Melting point
2. B.Boiling point
3. C.Liquid point
4. D.None of the above
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Answer: B
Q662025 · 14 Sept 2025
Which one of the following statements about surface tension is correct ?
1. A.It increases when temperature ‘Increases
2. B.It decreases when temperature increases
3. C.It will remain same with increase or decrease of temperature
4. D.It will always decrease with increase or decrease of temperature
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Answer: B
Q682025 · 14 Sept 2025
Why a fielder in the ground gradually pulls his hands backward while catching a fast moving cricket ball ?
1. A.To reduce the acceleration of the ball
2. B.To increase the acceleration of the ball
3. C.To increase the velocity of the ball
4. D.None of above
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Answer: A
Q692025 · 14 Sept 2025
Bottom of a tank containing water appears to be raised. It is due to
1. A.Reflection of light
2. B.Refraction of light
3. C.Interference of light
4. D.Diffraction of light
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Answer: B
Q702025 · 14 Sept 2025
SONAR stands for
1. A.Sonographic Natural Ranging
2. B.Simple Operational Navigation Ranging
3. C.Sound Navigation and Ranging
4. D.Simple Operational Natural Ranging
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Answer: C
Q712025 · 14 Sept 2025
Which one of the following radiations has longer wavelength ?
1. A.X-rays
2. B.Ultraviolet
3. C.Micro Wave
4. D.Infra-red
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Answer: C
Q722025 · 14 Sept 2025
For a material under static conditions, which one among the following statements is correct ?
1. A.An insulator can be charged
2. B.A perfect charged can be conductor
3. C.Both perfect conductor and insulator can be charged
4. D.Both perfect conductor and insulator cannot be charged
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Answer: A
Q742025 · 14 Sept 2025
The energy is always conserved for a system which is
1. A.isolated only
2. B.non-isolated only
3. C.both isolated and non-isolated
4. D.none of above
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Answer: A
Q752025 · 14 Sept 2025
Suppose, a ball of mass M is thrown upwards from a point A and it reaches up to the highest point B and returns back to point A, which one among the following is correct ?
1. A.Kinetic Energy at A = Potential Energy at B
2. B.Kinetic Energy at A = Potential Energy at A
3. C.Kinetic Energy at B = Potential Energy at B
4. D.Kinetic Energy at B = Kinetic Energy at A
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Answer: A
Q902025 · 14 Sept 2025
Which one of the following statements is NOT correct ?
1. A.Diamond is hard due to extended covalent bonding in it
2. B.Fullerene is composed of five and six membered rings
3. C.Diamond is a good conductor of electricity
4. D.Graphite is used as a lubricant
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Answer: C
Q642025 · 13 Apr 2025
Match List I with List II and select the answer using the code given below the Lists: $List I (Physical Quantity) A. Temperature B. Weight C. Mass D. Pressure List II (SI Unit) 1. Kelvin 2. Kilogram 3. Pascal 4. Newton$ code:
1. A.(a) - (1) , (b) - (2) , (c) - (4) , (d) - (3)
2. B.(a) - (3) , (b) - (4) , (c) - (2) , (d) - (1)
3. C.(a) - (1) , (b) - (4) , (c) - (2) , (d) - (3)
4. D.(a) - (3) , (b) - (2) , (c) - (4) , (d) - (1)
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Answer: C
Q672025 · 13 Apr 2025
Condensation of water vapour into water is influenced by which of the following factor/factors? 1Volume of air 2.Humidity 3.Temperature Select the answer using the code given below:
1. A.1 only
2. B.1 and 2 only
3. C.2 and 3 only
4. D.1, 2 and 3
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Answer: D
Q782025 · 13 Apr 2025
An object is placed between infinity and the pole (P) of a convex mirror. The position of the image is
1. A.between pole (P) and the focus (F), behind the mirror
2. B.between the focus (F) and infinity, behind the mirror
3. C.between the pole (P) and the infinity, in front of the mirror
4. D.at the focus (F), behind the mirror
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Answer: A