MDCAT Physics MCQ's Test With Answers

MDCAT Physics MCQ's Test

Sr. # Questions Answers Choice
1 The substance, which exists in two or more crystal forms under different conditions is called: Isomorphism Substance Allotropic substances True substances Polymorphous substances
2 Two substances having the same crystal structure are called: Isomorphism Subtance Allotropic subtances Polymorphous substances
3 A geometric shape of a solid obtained by regular, respetive, three-dimensional arrangements of its molecules,atoms or ions is called a: Crystal Crystal Lattice Crystal plane None of these
4 Which of the given pair have same dimension Stress, pressure Elastic modules, pressure Stress, elastic modules All have same dimension
5 Which of the following strain are possible in solids Linear Volumetric Shear All of these
6 Which of the following material have young and bulk modulus are same Brass Bone Aluminum Steel
7 Which of the material have largest value of young's modulus Copper Diamond Aluminum Iron
8 Glass and high carbon steel are Brittle substances Insulator Ductile substances None of these
9 __________ does not have linear strain Water Copper Aluminum Iron
10 A material with high retentively and large corcivety most useful to make Electromagnet Permanent magnet Choke None of these
11 Such substance which break soon after crossing the elastic limit is called Weak substance Ductile substance Brittle substance Organic substance
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 Wave front Locus Ray of light Either b and c
14 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
15 Speed of light in vacuum is 0 ms<sup>-1</sup> 3 x 10<sup>8</sup>ms<sup>-1</sup> 1.5 x 10<sup>8</sup>ms<sup>-1</sup> None of these
16 Angle between ray of light and the corresponding wave front is 10<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°</span> 60<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°</span> 90<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°</span> 120<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°</span>
17 Monochromatic light directly means waves of Same frequency Same color Same wavelength All of them
18 Wavelength of red color as compared to that of violet color is Smaller Longer Equal None of these
19 Which one of the following can act approximately as a source of monochromatic light Neon lamp Fluorescent tube Sodium lamp none of these
20 Wavelength of light, on the average, is given by 10<sup>-14</sup>m 10<sup>-10</sup>m 10<sup>-6</sup>m 10<sup>-4</sup>m
21 Light waves are Transverse waves Longitudinal waves Compressional wave None of these
22 When observed by transmitted light, the central band of newton's ring system consists of: Bright circular ring Dark circular ring May be bright or dark circular ring No interference bands
23 One angstrom equal: 10<sup>-8</sup>m 10<sup>-9</sup>m 10<sup>-10</sup>m 10<sup>-11</sup>m
24 Confining the light vibrations in one plane is called: Reflection of light Interference of light Polarization of light Diffraction of light
25 The most common method to obtain plane polarized light by using dichoric substance is: Selective absorption Reflection from different surfaces Refraction from different surfaces Scattering
26 Which one of the following is an optically active substance? Quartz crystal Calcite crystal Sugar solution All of these
27 A polaroid is: An adjustable shutter A device used to analyze polarized light A device used in polarimeter A light filter
28 The wavefront formed at very large distance from the source is: Cylindrical Spherical Elliptical Plane
29 The blue color of sky is due to: Dispersion Diffraction Polarization Scattering
30 Plane polarized light can be produced by: Simple reflection Refraction Selective absorption All of these
31 Sunset makes sky appears reddish because of: Diffraction of sun rays Refraction of light Scattering of light from dust particles Polarization of ligth
32 If 5000 lines/cm are ruled on a diffraction grating, the element is: 5 x 10<sup>-5</sup>m 2 x 10<sup>-6</sup>m 5 x 10<sup>-6</sup>m 2 x 10<sup>-5</sup>m
33 For a monochromatic light passing from air to glass, which one of the following statement is true? Frequency and wavelength decreases Frequency increases and wavelength decreases Frequency stays same, wavelength increases Frequency stays the same, wavelength decreases
34 When a ray of light enters a denser medium from a rarer medium,its: Wavelength increases Velocity increases Frequency decreases Wavelength decreases
35 A ray of light reflected from a dense medium under goes a phase change of: 30<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°</span> 60<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°</span> 90<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°</span> 180<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°</span>
36 A thin layer of oil on the surface of water looks colored due to: Diffraction of light Reflection of light Dispersion of light Interference effect of light
37 When crest of one wave falls on the crest of the other wave. This phenomenon is known as: Destructive interference Diffraction Polarization Constructive interference
38 The medium in which speed of light is the same in all directions is called: Homogeneous Heterogeneous Non-homogeneous Free space
39 A point source in a homogeneous medium gives rise to: A plane wavefront A spherical wavefront A cylindrical wavefront An elliptical wavefront
40 In order to get interference using two light rays: The sources should be monochromatic and coherent The sources should have the same frequency Superposition should be linear All of these
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