ECAT Pre General Science Physics Online Test With Answers

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ECAT Pre General Science Physics Online Test

Sr. # Questions Answers Choice
1 The speed of the secondary wavelets as mentioned in Huygen's principle is _____ the speed of propagation of the wave itself. Equal to Greater than Smaller than None of these
2 When a source of light isat very large distance,the shape of wavefront is: Spherical Cylindrical Plane None of these
3 Speed of light in vacuum depends upon: Frequency Wavelength Amplitude None of these
4 In case of point, source of light shape of wavefront is: Spherical Cylindrical Plane None of these
5 Huygen principle is used to determine: Speed of light Location of wavefront About polarized or unpolarized light None of them
6 Angle between the ray of light and the corresponding wavefront is: 0<span style="font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">°</span> 60<span style="font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">°</span> 90<span style="font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">°</span> 120<span style="font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">°</span>
7 The locus of all the points in the same phase of vibration is called: Wave packet Wave front Wave number None of them
8 Monochromatic light means waves of: Same frequency Same colour Same wavelength All of them
9 Frequency of red color as compared to that of violet color is: Equal Smaller Greater None of these
10 Wave length of that color as compared to that of violet color is: Smaller Longer Equal None of these
11 Which one of the following can act approximately as a source of monochromatic light; Neon lamp Fluorescent tube Sodium lamp None of these
12 Electromagnetic waves transport: Energy only Momentum only Both A and B are correct None of is correct
13 Wave length of light, on the average, is given by: 10<sup>-14</sup><sub>m</sub> 10<sup>-10</sup><sub>m</sub> 10<sup>-6</sup><sub>m</sub> 10<sup>-4</sup><sub>m</sub>
14 Light waves are: Transverse wave Longitudinal wave Compressional wave None of them
15 Light has: Wave nature Particle nature Dual nature None of these
16 For transmission of both transverse and longitudinal waves, we can use: Solid Gas Plasma None of these
17 transverse wave motion is possible in: Air A mixture of NH<sub>3</sub>and O<sub>2</sub> Strings All of these
18 The wave motion set up in any medium depends upon: Elasticity Inertia Density All of these
19 If one end of a rubber cord is fixed with a support and the other end is wiggled by hand, the waves generated on the card are: Stationary waves Transverse waves Both of these None of these
20 Which one of the following wave motions is transverse: Wave motion produced in water when a piece of stone is thrown into it Pulling of weight hanging vertically with a spiral spring Both of these None of these
21 Of the following, the option ______ reminds of longitudinal waves. Sound waves Heat waves Electromagnetic waves Light waves
22 Crests and troughs are formed in: Longitudinal waves Transverse waves Both of these None of these
23 In transverse waves, the individual particles of the medium move: In circles Perpendicular to the direction of level Parallel to the direction of level None of these
24 The portion of the water above its mean level forms a: Crest Trough Both A and B None of these
25 SI unit of wave length is: Kilometer Metre Centimetre Hertz
26 When the particles of the medium vibrate about their mean position, along the direction of the motion of waves, then the waves are called: Longitudinal waves Transverse waves Water waves Complex waves
27 In the formula for finding the speed of waves in the spring, unit of m in SIn units is: kg kg-meter kg/meter Meter/kg
28 Which one of the following elasticizes is possessed by fluids: Young's elastic modulus (length) Bulk elastic modulus (volume) Modulus of rigidity (shape) None of these
29 Which of the following medium/media can transmit both transverse and longitudinal waves: Solids Liquids Gases All of them
30 In solids, only following type/s of wave can travel: Transverse Longitudinal Both A and B None of them
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