MDCAT Physics MCQ's Test With Answers

MDCAT Physics MCQ's Test

Sr. # Questions Answers Choice
1 The fringe spacing in case of red light Increases Decreases Remains the same None of these
2  In the phenomenon of interference, the bright and dark fringes are of Different width Equal width Dark fringes are thicker than bright Nona of these
3 Fringe spacing ΔY is the distance between two adjacent bring fringes on the screen is ΔY = Lλ/d ΔY = Ld/λ ΔY = dλ/L ΔY = Lλ/d m
4 If the bright fringe into be observed then we have relation Y = mLd/λ Y = mλL/d Y = λd/mL Y = λL/md
5 When 'θ' is small then tan θ ≈ sin θ cos θ ≈ sin θ sin θ ≈ tan θ None of these
6 Point out angle/angle at which the sin θ and tan θ have the same value 2<sup>o</sup> and 8<sup>o</sup> 4<sup>o</sup> and 6<sup>o</sup> 2<sup>o</sup> and 4<sup>o</sup> 8<sup>o</sup> and 10<sup>o</sup>
7 If the path difference must be an integral multiple of wavelength sin&nbsp;θ = md/λ d sin&nbsp;θ = mλ d sin&nbsp;θ = m/λ d sin&nbsp;θ =&nbsp;λ/m
8 Who devise the experimental arrangement in 1801 for studying interference effects of light Huygen Young Newton None of these
9 The points on a Huygen's wave front which sends out secondary wavelets are also Source Source of secondary wavelets Coherent sources of light None of these
10 Huygen's wave front which sends out secondary wavelets with a speed equal to Speed of propagation of the wave Speed of propagation greater than wave Speed of propagation less than the wave None of these
11 The distance between two concentric wave fronts is A wave length A half wavelength Zero None of these
12 The wave propagates in space by the motion of the Particles Wavefronts Wavelength None of these
13 The light from the sun reaches to earth with wavefronts Spherical Cylindrical Plane None of these
14 Can two lights of car can produce interference Yes No Partly produce interference None of these
15 To observe the phenomenon of interference of light, the light should be Monochromatic Phase coherence Coherent sources All of these
16 An oil surface floating on water surface exhibits beautiful colour patter, which is due to  Reflection of light Diffraction of light Interference of light None of these
17 The position of a new wavefront after a certain interval of time can be found by constructing a surface that is A tangent A tangent envelope Curved surface None of these
18 Every point of a wavefront may be considered as a Source Source of wavefront Source of secondary wavefront None of these
19 A plane wavefront is that which has source Nearest Distant Near None of these
20 A spherical wavefront is that which has A source A point source An extended source None of these
21 A line normal to the wave front is called A beam of light A ray of light Both None of these
22 Wave front is the locus or all points in vibration are in the same Frequency Phase Wavelength All of these
23 Who confirm the wave theory of light ? Newton Michelson Newton Thomos Young
24 The idea of light as wave produced by Huygen Newton Thomos Young Michelson
25 Who gave the idea of light as wave ? Newton Huygen Thomos Young Bragg
26 Light is a type of energy which produces sensation of Sound Feeling Vision None of these
27 In a semiconductor,the mobility of holes is Greater then electrons Less than electrons Equal to electrons None
28 N-type crystal is Neutral Positively charged Negative charged None of these
29 The critical temperature for mercury is 1.18 K 4.2 K 3.72 K 7.2 K
30 Arsenic antimony or phosphorus are impurities of p-type n-type May be p-type or n-type None of these
31 In n-type substances the minority carriers are Holes Electrons Neutrons None
32 A substance which have empty conduction band is called Conductor Insulator Semiconductor None of these
33 The electrons in the outermost shell of an atom are called Valence electrons Tightly bound electrons Free electrons None of these
34 Young's modulus for copper is 70 x 10 Nm<sup>-2</sup> 91 x 10 Nm<sup>-2</sup> 110 Nm<sup>-2</sup> None of these
35 The units of modulus of elasticity are same as that of Stress Strain Force None
36 The ratio of applied stress to volumetric strain is called shear modulus Young's modulus Bulk modulus None of these
37 The measure of deformation of a solid when stress is applied to it is called Strain Stress Force None of these
38 When a strength changes the length of a body,it is called Tensile stress Shear stress Compressional stress
39 The whole structure obtained by the repetition of unit cell is known as Unit cell Crystal lattice Ore All of these
40 Polythene,polystyrene and nylon are example of Polymeric solids Crystalline solids Glassy solids
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