Physics · NDA previous year questions

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2024 39 questions

Q562024 · 1 Sept 2024
The intermixing of particles of two different types of matter on their own is called
1. A.Osmosis
2. B.Brownian motion
3. C.Diffusion
4. D.Conductance
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Answer: C
Q632024 · 1 Sept 2024
Two resistances of 5.0 Ω and 7.0 Ω are connected in series and the combination is connected in parallel with a resistance of 36.0 Ω. The equivalent resistance of the combination of three resistors is
1. A.24.0 Ω
2. B.12.0 Ω
3. C.9.0 Ω
4. D.6.0 Ω
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Answer: C
Q642024 · 1 Sept 2024
1. A. $ρ_{2} < ρ_{w} < ρ_{1}$
2. B. $ρ_{2} < ρ_{1} < ρ_{w}$
3. C. $ρ_{1} < ρ_{2} < ρ_{w}$
4. D. $ρ_{1} < ρ_{w} < ρ_{2}$
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Answer: C
Q662024 · 1 Sept 2024
Which of the following statements give characteristics of contact forces? 1. It appears between an object when it is in contact with some other object 2. It satisfies the third law of motion 3. It may appear between a pair of solid and fluid Select the answer using the code given below:
1. A.1 and 3 only
2. B.2 and 3 only
3. C.1 and 2 only
4. D.1, 2 and 3
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Answer: D
Q672024 · 1 Sept 2024
Which one among the following figures correctly represents the ray diagram ? (Consider the lens to be thin)
1. A.Option 1
2. B.Option 2
3. C.Option 3
4. D.Option 4
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Answer: C
Q702024 · 1 Sept 2024
Which one among the following diagrams may correctly represent the motion of a skydiver during a jump ?
1. A.Option 1
2. B.Option 2
3. C.Option 3
4. D.Option 4
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Answer: A
Q722024 · 1 Sept 2024
For an electric circuit given below, the correct combination of voltage (V) and current (I) is
1. A.V = 900 V; I = 18 A
2. B.V = 300 V; I = 5.5 A
3. C.V = 600 V; I = 1 A
4. D.V = 300 V; I = 2 A
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Answer: B
Q782024 · 1 Sept 2024
A point object is placed at the centre of curvature of a spherical concave mirror. Which one among the fol- lowing would be the correct location of image formed?
1. A.At infinity
2. B.At the centre of curvature
3. C.At the focal point
4. D.Between the focal point and the centre of curvature
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Answer: B
Q802024 · 1 Sept 2024
A vehicle starts moving along a straight line path from rest. In first t seconds it moves with an acceleration of $2 m/ s^{2}$ and then in next 10 seconds it moves with an acceleration of $5 m/ s^{2}$ . The total distance travelled by the vehicle is $550 m$ . The value of time t is
1. A. $10 s$
2. B. $13 s$
3. C. $20 s$
4. D. $25 s$
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Answer: A
Q812024 · 1 Sept 2024
A pumpkin weighs $7.5 N$ . On sub- merging it completely in water, $\frac{3}{4} L$ of water gets displaced. The acceleration due to gravity at the place where the pumpkin was weighed is $10 m/ s^{2}$ . Which one of the following is the correct value of the density of the pumpkin?
1. A. $10 kg/ m^{3}$
2. B. $100 kg/ m^{3}$
3. C. $1000 kg/ m^{3}$
4. D. $10000 kg/ m^{3}$
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Answer: C
Q822024 · 1 Sept 2024
An incandescent electric bulb converts 20% of its power consumption into light, and the remaining power is dissipated as heat. The bulb's filament has a resistance of 200 Ω and 2 A current flows through it. If the bulb remains ON for 10 h and the rate of electricity charge is Rs. 5/unit, then which among the following is the correct amount for the money spent on producing light?
1. A.Rs. 5
2. B.Rs. 6
3. C.Rs. 7
4. D.Rs. 8
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Answer: D
Q832024 · 1 Sept 2024
Which one of the following statements best defines the concept of heat?
1. A.The transformation of energy from one form to another
2. B.The conversion of energy into mass and vice-versa due to temperature difference
3. C.The transfer of energy due to temperature difference
4. D.The change in volume of a substance with temperature
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Answer: C
Q842024 · 1 Sept 2024
The masses of two planets are in the ratio of 1:7. The ratio between their diameters is 2: 1. The ratio of forces which they exert on each other is
1. A.1 : 7
2. B.7 : 1
3. C.1 : 1
4. D.2 : 1
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Answer: C
Q852024 · 1 Sept 2024
A car weighs 1000 kg. It is moving with a uniform velocity of 72 km/h towards a straight road. The driver suddenly presses the brakes. The car stops in 0.2 s. The retarding force applied on the car to stop it is
1. A.100 N
2. B.1000 N
3. C.10 kN
4. D.100 kN
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Answer: D
Q862024 · 1 Sept 2024
There is a ball of mass 320 g. It has 625 J potential energy when released freely from a height. The speed with which it will hit the ground is
1. A.62.5 m/s
2. B.2.0 m/s
3. C.50 m/s
4. D.40 m/s
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Answer: A
Q872024 · 1 Sept 2024
Starting from rest a vehicle accelerates at the rate of $2 m/ s^{2}$ towards east for $10 s$ . It then stops suddenly. It then accelerates again at a rate of $42 m/ s^{2}$ for next $10 s$ towards south and then again comes to rest. The net displacement of the vehicle from the starting point is
1. A. $100 m$
2. B. $200 m$
3. C. $300 m$
4. D. $400 m$
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Answer: C
Q912024 · 1 Sept 2024
At which temperature does liquid water show maximum density?
1. A.299 K
2. B.277 K
3. C.285 K
4. D.373 K
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Answer: B
Q982024 · 1 Sept 2024
Which one among the following is the correct focal length of a combination of lenses of power 2.5 D and -2.0 D?
1. A.+0.5 m
2. B.-0.5 m
3. C.+2.0 m
4. D.-2.0 m
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Answer: C
Q992024 · 1 Sept 2024
The AC mains domestic supply current in India changes direction in every
1. A.50 s
2. B. $\frac{1}{50}$ s
3. C.100 s
4. D. $\frac{1}{100}$ s
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Answer: D
Q1002024 · 1 Sept 2024
A block of mass 20 kg slides on a rough horizontal plane surface. Let the speed of the block at a particular instant is 10 m/s. It comes to rest after travelling a distance of 20 m. Which one of the following could be the magnitude of the frictional force?
1. A.10 N
2. B.20 N
3. C.40 N
4. D.50 N
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Answer: D
Q1022024 · 1 Sept 2024
MCQ (More than One Correct Answer) The figure given below shows the direction of the two forces P and Q acting on a skydiver : Which one among the following statements is correct about the two forces?
1. A.Force P is caused by the gravity and force Q is caused by the friction
2. B.When the force P is bigger than the force Q, the speed of the skydiver remains the same
3. C.After the parachute opens, force P remains the same while force Q increases
4. D.After the parachute opens, force P decreases while force Q increases
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Answer: A, C
Q512024 · 21 Apr 2024
1. A. $0Ω$
2. B. $2 + 25 Ω$
3. C. $2 + 5 Ω$
4. D. $\inftyΩ$
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Answer: B
Q522024 · 21 Apr 2024
1. A.1.0 mA
2. B.1.2 mA
3. C.3.0 mA
4. D.5.0 mA
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Answer: C
Q532024 · 21 Apr 2024
If the current through an electrical machine running on direct current is $15 A$ and the machine runs for 10 minutes, the charge that passes through the machine during this time is:
1. A. $1.50 C$
2. B. $150 C$
3. C. $900 C$
4. D. $9000 C$
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Answer: D
Q552024 · 21 Apr 2024
Which of the following forces is/are fundamental in nature? 1. Gravitational force 2. Electromagnetic forces 3. Strong and weak nuclear forces Select the correct 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