Physics ECAT Pre Engineering MCQ's Test For Full Book With Answers

Physics ECAT Pre Engineering MCQ's Test For Full Book

Sr. # Questions Answers Choice
1 The distance from eye to near point is taken as: 10 cm 15 cm 20 cm 25 cm
2 With age, least distance of distinct vision: Increases Decreases Is not affected None is correct
3 The least distance of distinct vision is: 10 cm 25 cm 50 cm 100 cm
4 In YDS experiment, fringe spacing means the distance between two consecutive ____fringes. Bright Dark Any of A and B None of these
5 In an interference pattern of Young's double slit(YDS) experiment: Bright fringesare wider than dark fringes Dark fringes are wider than bright fringes Both dark and bright fringes are of equal width <div><br></div><div>Central fringes are wider than the outer fringes</div>
6 In case of constructive interference of two waves, the amplitude of the resultant wave is _______ either of the waves: Greater than Equal to Smaller than None of these
7 The terms phase difference and path difference are: Same Different Equal None of these
8 In case of destructive interference of two waves, the amplitude of the resultant wave will be ____ either of the waves: Greater than Smaller than Equal to None of these
9 To observe interference of light, the condition, which must be met with is that the sources must be: Monochromatic Phase coherent Both of above None of above
10 To sources are said to be coherent if they have: Same amplitude Same wavelength Definite phase relation with each other None of them
11 The appearance of the colour in the soap (oil) film results from: Dispersion Interference Reflection Refraction
12 The property of light which does not change with the nature of the medium is: Frequency Amplitude Wavelength None of these
13 A line which represents the direction of travel of a wave is known as: Spherical Wavefront Locus Ray Either B or C
14 Huygen's principles states that: Light has dual nature Either of these None of these Light travels in straigth line
15 The wave nature of light was proposed by: Newton Thomas Young Huygen None of these
16 Laws of reflection and refraction can also be explained by: Particle nature of light Quantum nature of light Wave nature of light Complex nature of light
17 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
18 When a source of light isat very large distance,the shape of wavefront is: Spherical Cylindrical Plane None of these
19 Speed of light in vacuum depends upon: Frequency Wavelength Amplitude None of these
20 In case of point, source of light shape of wavefront is: Spherical Cylindrical Plane None of these
21 Huygen principle is used to determine: Speed of light Location of wavefront About polarized or unpolarized light None of them
22 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>
23 The locus of all the points in the same phase of vibration is called: Wave packet Wave front Wave number None of them
24 Monochromatic light means waves of: Same frequency Same colour Same wavelength All of them
25 Frequency of red color as compared to that of violet color is: Equal Smaller Greater None of these
26 Wave length of that color as compared to that of violet color is: Smaller Longer Equal None of these
27 Which one of the following can act approximately as a source of monochromatic light; Neon lamp Fluorescent tube Sodium lamp None of these
28 Electromagnetic waves transport: Energy only Momentum only Both A and B are correct None of is correct
29 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>
30 Light waves are: Transverse wave Longitudinal wave Compressional wave None of them
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