ECAT Pre General Science Physics Chapter 8 Waves Online Test With Answers

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ECAT Pre General Science Physics Chapter 8 Waves Online Test

Sr. # Questions Answers Choice
1 The velocity of sound is greatest in Water Air Vacuum Metal
2 Velocity of sound in vacuum (in m/s) is 330 1000 156 0
3 What is frequency of radio waves transmitted by a station, if the wavelength of those waves is 300 m? 1 MHz 10 Hz 1 GHz 100000 Hz
4 Energy is not carried by Transverse progressive waves Longitudinal vibration Stationary waves Electromagnetic
5 Which one is not produced by sound waves in air? Polarization Diffraction Refraction Reflection
6 Which of the following is the longitudinal waves? Sound waves Waves on plucked string Water waves Light waves
7 Laplace formula is derived from Isothermal change Adiabatic change Isobaric change None of these
8 Which waves are used in sonography? Microwaves Infra red waved Sound waves Ultrasonic waves
9 Mechanical waves on the surface of a liquid are Transverse Longitudinal Torsional both transverse and longitudinal
10 Velocity of sound in a diatomic as is 300 m/sec. what is its rms velocity? 400 m/sec 40 m/sec 430 m/sec 300 m/sec
11 At a certain instant a stationary transverse wave is found to have maximum kinetic energy. The appearance of string of that instant is Sinusoidal shape with amplitude A/3 Sinusoidal shape with amplitude A/2 Sinusoidal shape with amplitude A Straight line
12 With the propagation of a longitudinal wave through a material medium, the quantities transmitted in the propagation direction are Energy, momentum and mass Energy Energy and mass Energy and linear momentum
13 If the amplitude of sound is doubled and the frequency reduced to one-fourth, the intensity of sound at the same point will be Increasing by a factor of 2 Decreasing by a factor of 2 Decreasing by a factor of 4 Unchanged
14 For production of beats the two sources must have Different frequencies and same amplitude Different frequencies Different frequencies, same amplitude and same phase Different frequencies and same phase
15 The temperature at which the speed of sound becomes double as was at 27°C is 273<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°C</span> 0<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°C</span> 927<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°C</span> 1027<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°C</span>
16 Two sources of sound are said to be coherent if The produce sounds of equal intensity They produce sounds of equal frequency They produce sound waves vibrating with the same phase They produce sound waves with zero or constant phase difference all instant of time
17 When sound waves travel from air to water which of these remains constant? Velocity Frequency Wavelength All the above
18 Which type of wave can be set up in solids longitudinal waves transverse waves both of them none of them
19 The waves in which the particles of the medium have displacement along the direction of propagation of waves are called longitudinal waves transverse waves non-mechanical waves none of them
20 The waves in which the particles of the medium are displaced in a direction perpendicular to the direction of propagation of waves are known as longitudinal waves transverse waves non-mechanical waves none of them
21 Example of progressive wave is transverse waves longitudinal waves both of them none of them
22 A wave, which transfer energy by moving away from the source of disturbance is called a progressive wave travelling wave both of them none of them
23 In case of mechanical waves, we study the motion of a single particle collection of particle any one of them none of them
24 The example of mechanical wave is waves in ropes waves on water surface waves in air all of them
25 The waves which propagate out in space due to oscillation of electric and magnetic fields are known as e.m. waves mechanical waves sound waves water waves
26 The waves which propagate by the collision of material particles are known as e.m. waves mechanical waves light waves microwaves
27 Wave disturbances may also come in a concentrated bundle, like shock wave from an aeroplane flying at subsonic speed sonic speed super sonic speed any one of them
28 Waves transport energy without transport energy with matter both of them none of them
29 A weakly damped system has fairly sharp resonance curve flat resonance curve both of them none of them
30 A heavily damped system has a fairly sharp resonance curve flat resonance curve both of them none of them
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