Physics · NDA previous year questions

679 questions asked across 18 exam years, newest first

Year-wise papers Topic-wise questions

Practise this topic

2022 44 questions

Q582022 · 4 Sept 2022
When the pitch of sound increases, which one of the following increases?
1. A.Intensity
2. B.Loudness
3. C.Wavelength
4. D.Frequency
Show answer
Answer: D
Q722022 · 4 Sept 2022
What is the nature of velocity-time graph for a car moving with uniform acceleration?
1. A.Parabola
2. B.Logarithmic
3. C.Straight line
4. D.Exponential
Show answer
Answer: C
Q732022 · 4 Sept 2022
The amplitude of sound waves is measured in the units of
1. A.pressure
2. B.distance
3. C.time
4. D.speed
Show answer
Answer: A
Q742022 · 4 Sept 2022
A current of 0.6 A is drawn by an electric bulb for 10 minutes. Which one of the following is the amount of electric charge that flows through the circuit?
1. A.6 C
2. B.0.6 C
3. C.360 C
4. D.36 C
Show answer
Answer: C
Q762022 · 4 Sept 2022
The presence of magnetic field can be determined using which one of the following instruments?
1. A.Ammeter
2. B.Voltmeter
3. C.Magnetic needle
4. D.Motor
Show answer
Answer: C
Q772022 · 4 Sept 2022
Which one of the following statements about speed and velocity is correct?
1. A.Speed and velocity both are vector quantities.
2. B.Speed and velocity both are scalar quantities.
3. C.Speed is vector quantity and velocity is scalar quantity.
4. D.Speed is scalar quantity and velocity is vector quantity.
Show answer
Answer: D
Q902022 · 4 Sept 2022
Two convex lenses have focal lengths of 50 cm and 25 cm, respectively. If these two lenses are placed in contact, then the net power of this combination will be equal to
1. A.+2 dioptre
2. B.+6 dioptre
3. C.-6 dioptre
4. D.+3 dioptre
Show answer
Answer: B
Q912022 · 4 Sept 2022
Which one of the following terms cannot represent electrical power in a circuit?
1. A.VI
2. B. $I^{2} / R$
3. C. $I^{2} R$
4. D. $V^{2} / R$
Show answer
Answer: B
Q922022 · 4 Sept 2022
The refractive index of crown glass is close to 3/2. If the speed of light in air is c, then the speed of light in the crown glass will be close to
1. A.(3 / 2)c
2. B.(4 / 9)c
3. C.(2 / 3)c
4. D.(9 / 4)c
Show answer
Answer: C
Q932022 · 4 Sept 2022
The volume of a sealed packet is 1 liter and its mass is 800 g. The packet is first put inside the water with a density of $1 g c m^{- 3}$ and then in another liquid B with a density of $1.5 g c m^{- 3}$ . Then which one of the following statements holds true?
1. A.The packet will float in both water and liquid B.
2. B.The packet will sink in both water and liquid B.
3. C.The packet will sink in water but will float in liquid B.
4. D.The packet will float in water and sink in liquid B.
Show answer
Answer: A
Q942022 · 4 Sept 2022
A simple pendulum having bob of mass m and length of string l has time period of T. If the mass of the bob is doubled and the length of the string is halved, then the time period of this pendulum will be
1. A.T
2. B. $T / 2$
3. C.2T
4. D. $2 T$
Show answer
Answer: B
Q962022 · 4 Sept 2022
SONAR is a device that is used to measure the distance of underwater objects by a ship. Which of the following types of waves does it use for this purpose?
1. A.Infrasonic waves
2. B.Sound waves in audible range for human beings
3. C.Ultrasonic waves
4. D.All of the above
Show answer
Answer: C
Q972022 · 4 Sept 2022
Which one of the following statements about the speed of sound waves is not correct?
1. A.The speed of sound waves in steel is higher than that in water.
2. B.The speed of sound waves in air decreases with increase in temperature.
3. C.The speed of sound waves in air increases with increase in temperature.
4. D.The speed of sound waves in water is higher than that in air.
Show answer
Answer: B
Q982022 · 4 Sept 2022
The part of the human ear that converts the pressure variations associated with audible sound waves to electrical signals is
1. A.auditory nerve
2. B.cochlea
3. C.eardrum
4. D.eustachian tube
Show answer
Answer: B
Q1002022 · 4 Sept 2022
A bullet of mass 10 g is horizontally fired with velocity $300 m s^{- 1}$ from a pistol of mass 1 kg. What is the recoil velocity of the pistol?
1. A. $0.3 m s^{- 1}$
2. B. $3 m s^{- 1}$
3. C. $- 3 m s^{- 1}$
4. D. $- 0.3 m s^{- 1}$
Show answer
Answer: C
Q1012022 · 4 Sept 2022
A microphone converts
1. A.electrical signals to sound waves
2. B.sound waves to electrical signals
3. C.microwaves to sound waves
4. D.sound waves to microwaves
Show answer
Answer: B
Q522022 · 10 Apr 2022
Inhabitants are unaware of the speed of rotation of the planet Earth because 1. the angular velocity is constant for each place on the Earth's surface 2. the atmosphere rotates with the Earth 3. there are no nearby objects, either stationary or moving at a rate different from that of the Earth Which of the above is/are the correct explanation(s)?
1. A.1 only
2. B.1 and 2 only
3. C.2 and 3 only
4. D.1, 2 and 3
Show answer
Answer: D
Q602022 · 10 Apr 2022
The twinkling of a star is due to the atmospheric
1. A.diffraction of starlight
2. B.reflection of starlight
3. C.refraction of starlight
4. D.Scattering of starlight
Show answer
Answer: C
Q612022 · 10 Apr 2022
A mass M is dragged by a pulley on a horizontal plane by a force anti-parallel to its displacement. The work done in pulling the mass M is
1. A.zero
2. B.positive
3. C.infinite
4. D.negative
Show answer
Answer: D
Q622022 · 10 Apr 2022
A 5 N force is defined when a mass of 10 kg is accelerated with
1. A. $5.0 cm/ s^{2}$
2. B. $0.5 m/ s^{2}$
3. C. $0.5 cm/ s^{2}$
4. D. $5.0 m/ s^{2}$
Show answer
Answer: B
Q632022 · 10 Apr 2022
A boy of mass 52 kg jumps with a horizontal velocity of 2 m/s onto a stationary cart of mass 3 kg. The cart is fixed with frictionless wheels. Which one of the following would be the speed of the cart?
1. A.2.15 m/s
2. B.1.89 m/s
3. C.1.51 m/s
4. D.2.51 m/s
Show answer
Answer: B
Q642022 · 10 Apr 2022
The energy possessed by a body due to its change in position or shape is called
1. A.thermal energy
2. B.potential energy
3. C.kinetic energy
4. D.electric energy
Show answer
Answer: B
Q652022 · 10 Apr 2022
A sound wave has a frequency of 1 kHz and wavelength 50 cm. How long will it take to travel 1 km?
1. A.5 s
2. B.4 s
3. C.3 s
4. D.2 s
Show answer
Answer: D
Q732022 · 10 Apr 2022
What is the mass of a material, whose specific heat capacity is 400 J/(kg °C) for a rise in temperature from 15°C to 25°C, when heat received is 20 kJ ?
1. A.0.1 kg
2. B.1 kg
3. C.10 kg
4. D.5 kg
Show answer
Answer: D
Q742022 · 10 Apr 2022
The specific latent heat of vaporization of a substance is the quantity of heat needed to change unit mass from
1. A.liquid to vapour with a change of temperature
2. B.liquid to vapour without a change of temperature
3. C.vapour to liquid without a change of temperature
4. D.vapour to liquid with a change of temperature
Show answer
Answer: B