PPSC Physics Chapter 5 Waves and Wave Properties of Light With Answers

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PPSC Physics Chapter 5 Waves and Wave Properties of Light

Sr. # Questions Answers Choice
1 For how long the sensation of sound persists in our brain. 0.1 s 0.2 s 0.3 s 0.4 s
2 When wind blows in the same direction in which the sound travels, the sound velocity Decreases Increases Remains unchanged Becomes zero
3 Which of the following is a mechanical wave. X rays Radio waves Sound wave Light wave
4 Which term is used for the persistence of sound in a hall. Resonance Acoustics Symphony Reverberation
5 Which of the title for combining of notes that produce jarring effect on the ear. Noise Melody Harmony Discord
6 What will be the frequency it an employ vessel is filled with water. Increases Decreases Remain unchanged Fundamental
7 Which characteristics successively increases in the musical scale. Pitch Quality Loudness Amplitude
8 A pendulum vibrates with a time period of 1 s which range of sound is produced by it Audible Infrasonic Ultrasonci Super sonic
9 What is shapes of a pure note Sinwave Sawtooth Square wave Triangular wave
10 What will be the sound speed if the frequency is doubled. zero Half Double Unchanged
11 In order to har an echo what is the minimum distance between the sound and reflecting surface. 0.65 m 16.5 m 1.65 m 165 m
12 A water wave is an example of Electromagnetic wave Longitudinal wave Transverse wave Reverberation
13 A water wave is an example of Electromagnetic wave Longitudinal wave Transverse wave Reverberation
14 Echoes arise from Reflection Refraction Diffraction Dispersion of sound waves
15 In case of longitudinal waves the individual particles of the medium move. In circles In ellipses Parallel to wave propagation Perpendicular to wave propagation
16 To produce beats it is necessary to use two waves. Travelling in opposite direction Of slightly different frequencies Of equal wavelengths Of equal amplitudes
17 Difference in the density of two medium when waves are passing from one into another medium always results in the change in. Wave speed Wave direction Both speed and direction Wave frquency
18 When mas of a string is increased 4 times its original valve, the velocity of the wave. Becomes double Reduces to one half Reduces to one fourth Increases 4 times to its original value
19 Frequency less than 120 Hz are known as Infrasonic Ultra sonics Super sonics Infrared
20 Which property of waves is independent of the others. Amplitude Velocity Frequency Wavelength
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