Physics · NDA previous year questions

679 questions asked across 18 exam years, newest first

Year-wise papers Topic-wise questions

Practise this topic

2021 41 questions

Q602021 · 18 Apr 2021
LED (a semi-conductor device) is an abbreviation that stands for
1. A.Licence for Energy Dectector.
2. B.Light Energy Device.
3. C.Light Emitting Diode.
4. D.Lost Energy Detector.
Show answer
Answer: C
Q612021 · 18 Apr 2021
The statement "friction force is a contact force while magnetic force is a non-contact force" is
1. A.always true.
2. B.true only at 0°C.
3. C.a false statement.
4. D.either true or false depending upon the temperature of the surroundings.
Show answer
Answer: A
Q692021 · 18 Apr 2021
Which one of the following is the lowest possible temperature?
1. A.0° Celsius
2. B.-073° Celsius
3. C.-173° Celsius
4. D.-273° Celsius
Show answer
Answer: D
Q712021 · 18 Apr 2021
The image we see in plane mirror is
1. A.real and thus can be photographed.
2. B.virtual and nearer than the object.
3. C.virtual and is laterally inverted.
4. D.real but cannot be photographed.
Show answer
Answer: C
Q732021 · 18 Apr 2021
Point of Origin of Earthquake Wave is known as
1. A.Epicenter
2. B.Focus
3. C.Photosphere
4. D.Seismic Zone
Show answer
Answer: B
Q812021 · 18 Apr 2021
Twinkling of stars is due to
1. A.Particular frequencies of the starlight
2. B.reflection of starlight from the oceanic surface
3. C.atmospheric refraction of starlight
4. D.magnetic field of Earth
Show answer
Answer: C
Q822021 · 18 Apr 2021
Which one of the following cannot be the unit of frequency of a sound wave?
1. A.dB
2. B. $s^{- 1}$
3. C.Hz
4. D. $mi n^{- 1}$
Show answer
Answer: A
Q832021 · 18 Apr 2021
'Beats' is a phenomenon that occurs when frequencies of two harmonic waves are
1. A.equal
2. B.far apart
3. C.multiples of each other
4. D.nearly same
Show answer
Answer: D
Q842021 · 18 Apr 2021
Light waves are incident on an air-glass boundary. Some of the light waves are reflected and some are refracted in the glass. Which one of the following properties is the same for the incident wave and the refracted wave?
1. A.Speed
2. B.Direction
3. C.Brightness
4. D.Frequency
Show answer
Answer: D
Q892021 · 18 Apr 2021
Which of the following are the primary colours of light?
1. A.Yellow, Red and Green
2. B.Blue, Red and Green
3. C.Violet, Red and Yellow
4. D.Indigo, Violet and Green
Show answer
Answer: B
Q902021 · 18 Apr 2021
According to the New Cartesian Sign Convention, which one of the following is correct is respect of the formula $\frac{1}{f} = \frac{1}{v} + \frac{1}{u}$ , where symbols have their usual meanings?
1. A.It applies only to spherical mirrors
2. B.It applies only to spherical lenses
3. C.It applies to spherical mirrors as well as spherical lenses
4. D.It is an invalid formula
Show answer
Answer: A
Q972021 · 18 Apr 2021
Which one of the following statements is not correct for light rays?
1. A.Light travels at different speeds in different media
2. B.Light travels at almost 300 million metres per second in air
3. C.Light speeds down as it leaves a water surface and enters the air
4. D.Light speeds up as it leaves a glass surface and enters the air
Show answer
Answer: C
Q982021 · 18 Apr 2021
A glass prism splits white light into different colours. This phenomenon is called dispersion of light by prism. Which one of the following statements is correct?
1. A.Red light will deviate the most and it is because of the reflection of light
2. B.Violet light will deviate the most and it is because of the refraction of light
3. C.Red light will deviate the most and it is because of the refraction of light
4. D.Violet light will deviate the most and it is because of the reflection of light
Show answer
Answer: B
Q992021 · 18 Apr 2021
A current of 1.0 A is drawn by a filament of an electric bulb for 10 minutes. The amount of electric charge that flows through the circuit is
1. A.0.1 C
2. B.10 C
3. C.600 C
4. D.800 C
Show answer
Answer: C
Q1002021 · 18 Apr 2021
Which one of the following formulas does not represent electrical power?
1. A. $I^{2} R$
2. B. $I R^{2}$
3. C. $V I$
4. D. $V^{2} / R$
Show answer
Answer: B
Q1012021 · 18 Apr 2021
The sound created in a big hall persists because of the repeated reflections. The phenomenon is called
1. A.Reverberation
2. B.Dispersion
3. C.Refraction
4. D.Diffraction
Show answer
Answer: A