Physics · NDA previous year questions

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2025 45 questions

Q792025 · 13 Apr 2025
The work done in moving a charge of 2 coulomb (C) from point A to point B is 24 J. What is the potential difference between A and B?
1. A.48 V
2. B.6 V
3. C.12 V
4. D.0.08 V
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Answer: C
Q802025 · 13 Apr 2025
Two conducting wires of the same material and of equal lengths and equal diameters are first connected in parallel and then in series in a circuit across the same potential difference. The ratio of heat produced in parallel and series combinations is
1. A.2:1
2. B.4:1
3. C.1:2
4. D.1:4
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Answer: B
Q812025 · 13 Apr 2025
The magnetic field inside a long straight solenoid-carrying current
1. A.is zero
2. B.decreases as we move towards its end
3. C.increases as we move towards its end
4. D.is uniform inside the solenoid
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Answer: D
Q822025 · 13 Apr 2025
A car has an initial velocity of 12 m/s and is brought to rest over a distance of 45 m. The acceleration of the car is
1. A.+1·6 m/s²
2. B.+3·2 m/s²
3. C.-1·6 m/s²
4. D.-0·8 m/s²
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Answer: C
Q832025 · 13 Apr 2025
The universal constant of gravitation G has the unit
1. A.N
2. B.m/s
3. C.Joule
4. D.N·m²/kg²
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Answer: D
Q842025 · 13 Apr 2025
Two bodies of unequal masses are dropped from a tower. At any instant, they have equal
1. A.Momentum
2. B.Acceleration
3. C.Potential energy
4. D.Kinetic energy
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Answer: B
Q852025 · 13 Apr 2025
The frequency (f), wavelength (λ) and speed (v) of a sound wave are related as
1. A. $f = v λ$
2. B. $λ = v f$
3. C. $f = \frac{λ}{v}$
4. D. $v = λ f$
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Answer: D
Q862025 · 13 Apr 2025
The length of a simple pendulum is increased four times to its previous value while the mass is doubled. What is the ratio of the new and previous time period of the pendulum?
1. A.3:1
2. B.2:5
3. C.2:1
4. D.3:2
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Answer: C
Q882025 · 13 Apr 2025
What happens when the sunlight travels through the Earth’s atmosphere?
1. A.The blue colour is scattered more compared to the red colour
2. B.The red colour is scattered more compared to the blue colour
3. C.Both the blue and the red colours are scattered equally
4. D.The blue colour is not scattered but the red colour is scattered the most
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Answer: A
Q892025 · 13 Apr 2025
When a solid body is partially or completely immersed in a fluid, the fluid exerts an upward force on the body. The magnitude of the force is equal to 1.the mass of the body 2.the weight of the displaced fluid by the body Which of the above is/are correct?
1. A.1 only
2. B.2 only
3. C.Both 1 and 2
4. D.Neither 1 nor 2
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Answer: B
Q902025 · 13 Apr 2025
If the length of a copper wire is increased by twice, then its resistivity will be
1. A.Doubled
2. B.Halved
3. C.Same
4. D.One-fourth
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Answer: C
Q912025 · 13 Apr 2025
Which one of the following is dimensionless quantity?
1. A.Stress
2. B.Strain
3. C.Pressure
4. D.Force
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Answer: B
Q922025 · 13 Apr 2025
A system that does NOT allow exchange of heat with its surrounding is called
1. A.Adiabatic system
2. B.Non-adiabatic system
3. C.Equilibrium system
4. D.Non-equilibrium system
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Answer: A
Q942025 · 13 Apr 2025
A current through a horizontal power line flows in east to west direction. What will be the direction of magnetic field at a point directly below it when viewed from east end?
1. A.Clockwise in a plane perpendicular to the wire
2. B.Anti-clockwise in a plane perpendicular to the wire
3. C.Clockwise in a plane parallel to the wire
4. D.Anti-clockwise in a plane parallel to the wire
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Answer: B
Q962025 · 13 Apr 2025
When a light ray passes through from air to water with a non-zero angle the ray will be
1. A.bending towards the normal
2. B.bending away from the normal
3. C.propagating in straight line
4. D.reflected towards the opposite direction
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Answer: A
Q972025 · 13 Apr 2025
Which one of the following equations related to the motion of an object is NOT correct? (Symbols carry their usual meanings)
1. A. $s = u t + \frac{1}{2} a t^{2}$
2. B. $u = v - a t$
3. C. $u^{2} - v^{2} = 2 a s$
4. D.Distance traveled during the $n^{t h}$ second $= u + \frac{1}{2} a (2 n - 1)$
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Answer: C
Q982025 · 13 Apr 2025
Which one of the following statements is NOT correct?
1. A.An ammeter is always connected in series in the circuit to measure the current
2. B.A Voltmeter is always connected to parallel in a circuit to measure the voltage
3. C.A voltmeter has a high resistance and an ammeter has a low resistance
4. D.A voltmeter has a low resistance and an ammeter has a high resistance
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Answer: D
Q1002025 · 13 Apr 2025
If three resistors of 1 Ohm each connect in parallel to each other the resultant resistance is
1. A.1 Ohm
2. B.1/3 Ohm
3. C.3 Ohm
4. D.9 Ohm
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Answer: B
Q1012025 · 13 Apr 2025
We hear an echo due to
1. A.Refraction of sound waves
2. B.Reflection of sound waves
3. C.Diffraction of sound waves
4. D.Resonance due to sound waves
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Answer: B
Q1022025 · 13 Apr 2025
At uniform speed the acceleration is
1. A.Maximum
2. B.Minimum
3. C.Zero
4. D.Constant
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Answer: C