Physics · NDA previous year questions

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2021 41 questions

Q652021 · 14 Nov 2021
Buoyancy is a/an
1. A.Upward pressure
2. B.Downward pressure
3. C.Downward force
4. D.Upward force
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Answer: D
Q662021 · 14 Nov 2021
Weight and mass of an object are defined with Newton’s laws of motion. Which among the following is true ?
1. A.Weight is a constant of proportionality.
2. B.Mass is a constant of proportionality.
3. C.Mass is not a constant of proportionality.
4. D.Weight is a universal constant.
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Answer: B
Q672021 · 14 Nov 2021
Fundamental laws of physics require
1. A.conservation of energy and non-conservation of charge.
2. B.conservation of charge and non-conservation of linear momentum.
3. C.conservation of charge and non-conservation of energy.
4. D.conservation of energy, momentum and charge.
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Answer: D
Q682021 · 14 Nov 2021
Work is said to be one Joule when a force of
1. A.4 N moves an object by 25 cm.
2. B.2 N moves an object by 1 m.
3. C.1 N moves an object by 1 cm.
4. D.1 N moves an object by 50 cm.
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Answer: A
Q692021 · 14 Nov 2021
A uniform motion of a car along a circular path experiences
1. A.a change in speed due to a change in its direction of motion.
2. B.a change in velocity due to a change in its direction of motion.
3. C.a change in momentum due to no change in its direction of motion.
4. D.a constant momentum due to a change in its direction of motion.
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Answer: B
Q702021 · 14 Nov 2021
Three equal resistors are connected in parallel configuration in a closed electrical circuit. Then the total resistance in the circuit becomes
1. A.one-third of the individual resistance.
2. B.two-third of the individual resistance.
3. C.equal to the individual resistance.
4. D.three times of the individual resistance.
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Answer: A
Q772021 · 14 Nov 2021
Imagine a current-carrying straight conductor with magnetic field of lines in anti-clockwise direction. Then the direction of current is determined by
1. A.the Right-Hand Thumb rule and it would be in the downward direction.
2. B.the Left-Hand Thumb rule and it would be in the downward direction.
3. C.the Right-Hand Thumb rule and it would be in the upward direction.
4. D.the Left-Hand Thumb rule and it would be in the upward direction.
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Answer: C
Q802021 · 14 Nov 2021
Tyndall effect is a phenomenon of
1. A.scattering of light by the colloidal particles.
2. B.refraction of light by the colloidal particles.
3. C.dispersion of light by dust particles.
4. D.refraction of light by dust particles.
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Answer: A
Q832021 · 14 Nov 2021
Power of a lens of focal length 25 cm is
1. A.+2.5 Diopter
2. B.+3 Diopter
3. C.+4 Diopter
4. D.+5 Diopter
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Answer: C
Q872021 · 14 Nov 2021
Spherical mirror formula relating an object distance ‘u’, image distance ‘v’ and focal length of mirror ‘f’ may be applied to a plane mirror when
1. A.focal length goes to infinity.
2. B.focal length goes to zero.
3. C.image distance goes to zero.
4. D.image distance goes to infinity.
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Answer: A
Q892021 · 14 Nov 2021
Reverberation is a phenomenon associated with a
1. A.multiple refraction of sound.
2. B.multiple reflection of sound.
3. C.single refraction of sound.
4. D.single reflection of sound.
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Answer: B
Q902021 · 14 Nov 2021
Which among the following is true for propagation of sound waves?
1. A.Sound can travel in vacuum and it is a transverse wave in air.
2. B.Sound cannot travel in vacuum and it is a longitudinal wave in air.
3. C.Sound can travel in vacuum and it is a longitudinal wave in air.
4. D.Sound cannot travel in vacuum and it is a transverse wave in air.
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Answer: B
Q912021 · 14 Nov 2021
A tennis ball is thrown in the vertically upward direction and the ball attains a maximum height of 20 m. The ball was thrown approximately with an upward velocity of
1. A.8 m/s
2. B.12 m/s
3. C.16 m/s
4. D.20 m/s
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Answer: D
Q922021 · 14 Nov 2021
An object of mass 2000 g possesses 100 J kinetic energy. The object must be moving with a speed of
1. A.10.0 m/s
2. B.11.1 m/s
3. C.11.2 m/s
4. D.12.1 m/s
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Answer: A
Q962021 · 14 Nov 2021
The unit of the ratio between thrust and impulse is same as that of
1. A.frequency
2. B.speed
3. C.wavelength
4. D.acceleration
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Answer: A
Q972021 · 14 Nov 2021
Which one of the following figures correctly shows the path of a ray of light through a glass prism ?
1. A.Option A
2. B.Option B
3. C.Option C
4. D.Option D
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Answer: A
Q982021 · 14 Nov 2021
When a light beam falls on a triangular glass prism, a band of colours is obtained. Which one of the following statements is correct in this regard ?
1. A.Red light bends the most, as the refractive index of glass for red light is greatest.
2. B.Red light bends the most, as the refractive index of glass for red light is lowest.
3. C.Violet light bends the most, as the refractive index of glass for violet light is greatest.
4. D.Violet light bends the most, as the refractive index of glass for violet light is lowest.
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Answer: C
Q992021 · 14 Nov 2021
The image of an object formed by a plane mirror is
1. A.erect, real and larger.
2. B.erect, virtual and same size.
3. C.inverted, virtual and same size.
4. D.inverted, real and smaller.
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Answer: B
Q1002021 · 14 Nov 2021
Which one of the following is not a conservative force ?
1. A.Frictional force
2. B.Electric force
3. C.Gravitational force
4. D.Spring force
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Answer: A
Q1012021 · 14 Nov 2021
A negative work is done when an applied force F and the corresponding displacement S are
1. A.perpendicular to each other.
2. B.parallel to each other.
3. C.anti-parallel to each other.
4. D.equal in magnitude.
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Answer: C
Q532021 · 18 Apr 2021
The electrostatic potential doesn't depend on which of the following (1) It depends on the charge (2) It depends on the endpoints of the path through work done (3) It depends on the path taken for the work done (4) It depends on the amount of work done
1. A.Only statement 1
2. B.Only statement 2
3. C.Only statement 3
4. D.Only statement 4
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Answer: C
Q542021 · 18 Apr 2021
Mirage is an illustration of
1. A.only dispersion of light.
2. B.only reflection of light.
3. C.only total internal reflection of light.
4. D.both refraction and total internal reflection of light.
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Answer: D
Q572021 · 18 Apr 2021
Consider the following statements about Light year: 1. Light year is a unit for measurement of very large distances. 2. Light year is a unit for measurement of very large time intervals. 3. Light year is a unit for measurement of intensity of light. Which of the statements given above is/are correct?
1. A.1, 2 and 3
2. B.2 and 3 only
3. C.1 and 2 only
4. D.1 only
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Answer: D
Q582021 · 18 Apr 2021
Which one of the following regarding density of water at atmospheric pressure is correct?
1. A.Density of water at $4^{\circ} C$ is $1000 kg/ m^{3}$ .
2. B.Density of water at $0^{\circ} C$ is $1000 kg/ m^{3}$ .
3. C.Density of water at $0^{\circ} C$ is $100 kg/ m^{3}$ .
4. D.Density of water at $4^{\circ} C$ is $10 kg/ m^{3}$ .
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Answer: A
Q592021 · 18 Apr 2021
Which of the following pairs of physical phenomenon and the discover is/are correctly matched? $1. James Chadwick 2. Albert Einstein 3. Marie Curie Photoelectric Neutron Radium$ Select the correct answer using the code given below:
1. A.1, 2 and 3
2. B.1 and 2 only
3. C.2 and 3 only
4. D.3 only
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Answer: D