PPSC Physics Full Book With Answers

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PPSC Physics Full Book

Sr. # Questions Answers Choice
1 Tuning fork is a source of. Heat Energy Light Sound
2 A pulse on the string is inverted when it is reflected from Free end Fixed end Either of the two Rubber cord
3 Stationary waves only a discrete set of frequencies are set up in a medium. This fact is called. Harmonics Overtones Quantization of frequencies Superposition of frequencies
4 Which of the following medium can transmit both transverse and longitudinal waves. Solid Gas Liquid Plasma
5 It is possible is distinguish between transvers and longitudinal waves from the property of. Refraction Interference Diffraction Polarization
6 In a stationary wave the particle velocity at the node is Zero Constant Minimum Maximum
7 When amplitude of a wave becomes double its energy becomes. Xero Double 4 times 6 times
8 Beats are the result of. Interference Doppler's effect Ultrasound Polarization
9 Doppler's effect can be applied to. Light wave only sound wave only Both light waves and sound waves Study various features of a wave
10 With the increase of temperature, teh pitch of an organ pipe Increase Descrease Remain the same May increase or decrease
11 In a spectrometer experiment monochromatic light is incident normally on a diffraction gratin having 4.5 x 105 lines per metre The second order line is seen at an angle of 30 o to The normal What is the wavelength of the light. 430 nm 556 nm 589 nm 625 nm
12 Velocity of sound in any medium deepness upon. Elasticity Density Volume Mass
13 Velocity of sound in air at a given temperature. Increases with increase in pressure Decrease with increases in pressure Is independent of pressure Becomes quadruples
14 When a sound source moves towards a stationary observer there is. An apparent increase in wavelength An apparent increase in frequency an apparent decreases in frequency A change in the velocity of the sound
15 The ripple tank is used to study various features of Wave phenomenon Interferences Doppler's effect Reverberation
16 Which of the following phenomenon occurs when two sound waves of equal amplitude and different frequencies travel through the same region. Resonance Doppler's effect Beats Echo
17 In solid and liquids the variation of the speed of sound with temperature is. Much greater than in air Slightly les than in air The same as in air Smell and usually negligible
18 The variation in the speed of sound with temperature is greater in. Gases Metals Liquids Insulators
19 The sweetness or harshness of a sound depends upon its Wavelength Frequency Amplitude Regularity
20 The pitch of sound depends on its Wavelength Frequency Wave amplitude Harmonic content
21 The loudness of a sound depends on its Wavelength Frequency Wave amplitude Regularity
22 The loudness of a sound deepness on its Wavelength Frequency Wave amplitude Regularity
23 Which of the following are examples of transverse and a longitudinal wave. Radio and sound waves Radio and light waves Light and water ripples Light and sound waves
24 The velocity of the wave could be increased by Reducing the amplitude Decreasing the frequency Increasing the period Stretching the spring more
25 The amplitude of sound wave determines its Pitch Loudness Reverberation Interference
26 The quality of sound Decreases with pitch Varies directly as its pitch Varies inversely as its pitch Depends upon the overtones present there
27 The pitch of sound a determined by its Speed Frequency Direction Number of beats
28 For how long the sensation of sound persists in our brain. 0.1 s 0.2 s 0.3 s 0.4 s
29 When wind blows in the same direction in which the sound travels, the sound velocity Decreases Increases Remains unchanged Becomes zero
30 Which of the following is a mechanical wave. X rays Radio waves Sound wave Light wave
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