Physics · NDA previous year questions

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2026 45 questions

Q762026 · 12 Apr 2026
1. A.0
2. B. $15 m/s$
3. C. $30 m/s$
4. D. $40 m/s$
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Answer: D
Q772026 · 12 Apr 2026
1. A. $x = 14$ and $y = 32$
2. B. $x = 16$ and $y = 30$
3. C. $x = 18$ and $y = 32$
4. D. $x = 18$ and $y = 30$
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Answer: B
Q782026 · 12 Apr 2026
A light ray is falling on a face of an equilateral glass prism as shown in the figure: Which one of the following diagrams correctly shows the complete path of the ray through the glass prism?
1. A.Option A
2. B.Option B
3. C.Option C
4. D.Option D
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Answer: D
Q792026 · 12 Apr 2026
1. A. $L_{1} = 3 L$ and $A_{1} = 2 A$
2. B. $L_{1} = L$ and $A_{1} = A$
3. C. $L_{1} = 2 L$ and $A_{1} = 3 A$
4. D. $L_{1} = 2 L$ and $A_{1} = 2 A$
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Answer: A
Q802026 · 12 Apr 2026
With respect to electromagnetic waves, the human eye is sensitive to
1. A.both electric and magnetic fields
2. B.electric field only
3. C.magnetic field only
4. D.infrared part of the electromagnetic spectrum
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Answer: B
Q812026 · 12 Apr 2026
What is the upward force acting on a skydiver of mass $60 kg$ who is falling at a uniform speed of $2 m/s$ ?
1. A.0
2. B. $60 N$
3. C. $588 N$
4. D. $708 N$
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Answer: C
Q822026 · 12 Apr 2026
It has been observed that a mirror always forms the image between the pole and the focus, irrespective of the location of the object. Which one of the following is correct in respect of the nature of the mirror?
1. A.It is a plane mirror.
2. B.It is a convex mirror.
3. C.It is a concave mirror of small focal length.
4. D.It is a concave mirror of large focal length.
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Answer: B
Q832026 · 12 Apr 2026
A periscope uses two plane mirrors inclined at $4 5^{\circ}$ . If the tube of the periscope is filled with a completely transparent liquid of refractive index 1.5, then which one of the following is correct in respect of the image seen?
1. A.The image will remain unchanged.
2. B.The image will appear laterally shifted.
3. C.The image will appear 1.5 times brighter.
4. D.The image will appear 1.5 times darker.
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Answer: A
Q842026 · 12 Apr 2026
A lightning rod with sharp tip reduces damage risk. Which one of the following is the primary reason for it?
1. A.It attracts lightning directly.
2. B.The sharp tip reduces the local electric field.
3. C.It enhances field and promotes continuous corona discharge.
4. D.It repels charged clouds.
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Answer: C
Q862026 · 12 Apr 2026
A particle is moved from point $X$ to point $Y$ under a force field. The work done depends only on the initial and final speeds. Which one of the following is correct?
1. A.The force is conservative.
2. B.The net work equals the change in kinetic energy.
3. C.The force is constant.
4. D.The velocity must always increase.
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Answer: B
Q872026 · 12 Apr 2026
An object is placed far beyond the centre of curvature of a concave mirror. The object then starts accelerating towards the mirror. Which one of the following is correct?
1. A.The image will accelerate towards the centre of curvature.
2. B.The image will accelerate towards the focus.
3. C.The image will accelerate towards the pole of the mirror.
4. D.The image will move with a constant speed towards the focus.
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Answer: A
Q902026 · 12 Apr 2026
A $5 g$ piece of ice at $- 2 0^{\circ} C$ is put into $m kg$ of water at $3 0^{\circ} C$ temperature. The heat is exchanged only between the ice and the water. The final temperature of the mixture is $0^{\circ} C$ in liquid phase. What is the value of $m$ in kg?
1. A.0.050
2. B.0.010
3. C.0.015
4. D.0.150
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Answer: C
Q912026 · 12 Apr 2026
A constant power machine pulls a block on a smooth horizontal surface. Which one of the following correctly describes the relation between speed of the block ( $v$ ) and time ( $t$ )?
1. A. $v \propto t$
2. B. $v \propto t$
3. C. $v \propto t^{2}$
4. D. $v \propto t^{3/2}$
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Answer: B
Q922026 · 12 Apr 2026
A floating body is in stable state. Which one of the following is correct?
1. A.The centre of gravity of the body is above its centre of buoyancy.
2. B.The centre of gravity of the body is below its centre of buoyancy.
3. C.The centre of gravity of the body coincides with its centre of buoyancy.
4. D.The centre of gravity of the body is below the metacentre.
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Answer: D
Q932026 · 12 Apr 2026
A ball is dropped from rest from height $h$ above the ground in frame $S$ (the Earth's frame). Another frame $S^{'}$ is moving upwards with constant speed $u$ relative to the Earth. In frame $S^{'}$ , the ball has initial downward speed $v$ . Pertaining to the change in kinetic energy ( $Δ K$ ) of the ball from release to just before hitting the ground as measured in frames $S$ and $S^{'}$ separately, which one of the following is correct?
1. A. $Δ K$ is the same in both the frames.
2. B. $Δ K$ is larger in frame $S$ .
3. C. $Δ K$ is larger in frame $S^{'}$ .
4. D. $Δ K$ cannot be compared without the information of mass of the ball.
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Answer: C
Q942026 · 12 Apr 2026
The position vector of a particle is given by $r = 3 t^{2} \hat{i} + 2 t \hat{j} + 5 \hat{k}$ . Which one of the following statements is correct?
1. A.The force acting on the particle is parallel to the instantaneous momentum of the particle.
2. B.The force acting on the particle is perpendicular to the instantaneous momentum of the particle.
3. C.The particle experiences zero force.
4. D.The force acting on the particle is not parallel to the instantaneous momentum of the particle.
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Answer: D
Q952026 · 12 Apr 2026
For an object in gravitational field, the gravitational potential is the same at two points $A$ and $B$ , but the gravitational field is not the same at these two points. Which one of the following statements is correct?
1. A.Positive work is done by gravity in moving the object from point $A$ to point $B$ .
2. B.Negative work is done by gravity in moving the object from point $A$ to point $B$ .
3. C.Gravity must be non-conservative in such a region.
4. D.No work is done by gravity in moving the object from point $A$ to point $B$ .
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Answer: D
Q982026 · 12 Apr 2026
A solid of mass $m$ has temperature-dependent specific heat as $C (T) = C_{0} + α T$ , where $C_{0}$ and $α$ are constants. The solid is heated from $T_{1}$ to $T_{2}$ . Which one of the following is the correct expression for quantity of heat $(Q)$ of the solid mass?
1. A. $Q = m C_{0} (T_{2} - T_{1})$
2. B. $Q = m (T_{2} - T_{1}) [C_{0} + α (T_{1} + T_{2})]$
3. C. $Q = m (T_{2} - T_{1}) [C_{0} (T_{1} + T_{2}) + α]$
4. D. $Q = m (T_{2} - T_{1}) [C_{0} + \frac{α}{2} (T_{1} + T_{2})]$
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Answer: D
Q992026 · 12 Apr 2026
Two forces of equal magnitude simultaneously act at a point. It is observed that the resultant force is equal in magnitude to the individual forces. Which of the following statements is/are correct? I. The angle between one of the individual forces and the resultant force is $π /3$ . II. The angle between the individual forces is $2 π /3$ .
1. A.I only
2. B.II only
3. C.Both I and II
4. D.Neither I nor II
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Answer: C
Q1002026 · 12 Apr 2026
A pendulum of length $L$ oscillates with an angular amplitude of $θ = 6 0^{\circ}$ and time period $T$ . Let $T_{0} = 2 π \frac{L}{g}$ be the time period for small angle of oscillations, where $g$ is the acceleration due to gravity. If air resistance is negligibly small and the string remains straight, then which one of the following is correct?
1. A. $T$ will be slightly greater than $T_{0}$ .
2. B. $T$ will be slightly smaller than $T_{0}$ .
3. C. $T$ will be exactly equal to $T_{0}$ .
4. D. $T$ will depend upon the mass of the bob.
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Answer: A