MDCAT Physics MCQ's Test With Answers

MDCAT Physics MCQ's Test

Sr. # Questions Answers Choice
1 In cause of YDS experiment, the distance between adjacent bright fringes is given by <span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 24px; text-align: center; background-color: rgb(255, 255, 224);"><i>Δ</i></span>y =<span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 24px; text-align: center; background-color: rgb(255, 255, 224);"><i>λ</i></span>L/d <span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 24px; text-align: center; background-color: rgb(255, 255, 224);"><i>Δ</i></span>Y = L/<span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 24px; text-align: center; background-color: rgb(255, 255, 248);"><i>λ</i></span>d <span style="font-family: &quot;Times New Roman&quot;; font-size: 24px; color: rgb(34, 34, 34); text-align: center; background-color: rgb(255, 255, 224);"><i>Δ</i></span>Y =<span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 24px; text-align: center; background-color: rgb(255, 255, 224);"><i>λ</i></span>/L None of these
2 In YDS experiment, condition for constructive interference is that path difference is equal to n<span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 24px; text-align: center; background-color: rgb(255, 255, 224);"><i>λ</i></span> m<span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 24px; text-align: center; background-color: rgb(255, 255, 224);"><i>λ</i></span> (n + 1/2)<span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 24px; text-align: center; background-color: rgb(255, 255, 224);"><i>λ</i></span> (m + 1/2)<span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 24px; text-align: center; background-color: rgb(255, 255, 224);"><i>λ</i></span>
3 Experimental demonstration of wave nature of light was given in 1801 by New ton Maxwell Thomas young Huygen
4 In an interference pattern of Young,s Double Slit (YDS) experiment Bright fringes are wider than dark fringes Dark fringes are wider than bright fringes Both dark and bright fringes are of equally spaced Central fringes are wider than the outer fringes
5 Phase change of 180° is equivalent to a path difference of 2<span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 24px; text-align: center; background-color: rgb(255, 255, 224);"><i>λ</i></span> <span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 24px; text-align: center; background-color: rgb(255, 255, 224);"><i>λ</i></span> <span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 24px; text-align: center; background-color: rgb(255, 255, 224);"><i>λ/2</i></span> <span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 24px; text-align: center; background-color: rgb(255, 255, 224);"><i>λ/4</i></span>
6 In case of destructive interference of two waves, the amplitude of the resultant wave will be ______ either of the waves Greater then Smaller then Equal to None of these
7 The path difference and phase difference are related to each other as Phase difference = (2<span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 24px; text-align: center; background-color: rgb(255, 255, 248);"><i>π</i></span>) x path difference Phase difference = (2<span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 24px; text-align: center; background-color: rgb(255, 255, 248);"><i>π</i></span>/<span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 24px; text-align: center; background-color: rgb(255, 255, 224);"><i>λ</i></span>) x path difference Phase difference = (<span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 24px; text-align: center; background-color: rgb(255, 255, 224);"><i>λ</i></span>/2) x path difference Phase difference = (2<span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 24px; text-align: center; background-color: rgb(255, 255, 224);"><i>λ</i></span>/<i style="text-align: center;">π</i><span style="text-align: center;">) x path difference</span>
8 The modulus of rigidity of a liquid is: Zero 1 Infinite None of these
9 The fractional change in volume per unit increase is pressure in called: Pressure coefficient Volume coefficient Bulk modulus Compressibitlity
10 A wire can support a load W without breaking. It is cut into two equal parts. The maximum load that each part can support is: W/4 W/2 W 2 W
11 The results of mechanical tests are usually represents in terms of: Stress Strain Both A &amp; B None of these
12 The reciprocal of bulk modulus is called: Shear modulus Elasticity Young's modulus Compressibility
13 The atom or molecules in crystalline solids are held together by: Cohesive force Adhesive force Gravitational force Magnetic forces
14 The smallest part of a crystal lattice is called: A molecule An atom A unit cell A particle
15 Molecules of a solid possess: Translation motion Vibration motion Rotation motion Linear motion
16 Which one of the following has only bulk modulus? Diamond Glass Tungsten Water
17 A steel bar can bear a load of 20 tons. If the thickness of bar is double, then for the same depression it can bear a load of: 40 ton 80 ton 160 ton 5 ton
18 If a wire is stretched to double of its length then the strain will be 1 0.5 2 0
19 What is the SI unit of Tensile strain? Nm<sup>-2</sup> Jm<sup>-2</sup> Nm<sup>-1</sup> Being a number, it has no unit
20 Which of the following substances possesses the highest elasticity? Al Copper Steel Rubber
21 The SI unit of stress is same as that of. Momentum Pressure Force Length
22 Which of the following is an example of Brittle substances? Copper and Brass Brass and glass Copper and glass Only glass
23 The value of young modulus in Nm-2for water is 70 x 10 2.2 x 10<sup>5</sup> Zero None of these
24 The temperature below which materials are superconductor is called as: Kelvin temperature Critical temperature Curie temperature none of these
25 Shear stress addresses to the: Volume changes due to the applied stress Shape changes due to the applied stress Length changes due to the applied stress All of the above
26 After elastic limit the shape of graph is Curved Straight Line Saw tooth Arbitrary
27 Stree is _________ property of solids
 Electrical Polymeric Conductive Mechanical
28 The maximum stress that a body can tolerate is called UTS Permanent stress Elastic strength Plastic stress
29 S.I unit of stress is N/m N m Nm<sup>-2</sup> newton
30 Stress may be Tensile Compressive Shear All of these
31 Bulk modulus is involved when the deformation is One dimensional Two dimensional Three dimensional All of these
32 The electrons, which can wander in the solid, are known as: Valence electron Free electron Loosely bound electrons None of these
33 ________ is a pattern which has got one more atom at the centre of a simple cube. Simple cube Face centered cube Body centered cube None of these
34 __________ is a cubic pattern having one extra atom or molecule at the centre of each of the six faces of the cube Simple cube Face centered cube Body centered cube None of these
35 In a crystal the density of atoms or molecules does not vary from direction to direction. This is known as: Cleavage Anisotropy Homogeneity None of these
36 If one atom or molecule lies out each of the eight corners of a cube, it is called Simple cube Face centered cube Body centered cube None of these
37 The property due to which the size or shape of a lattice is not important is called Cleavage Anisotropy Homogenity None of these
38 When a crystal is subjected to stress, it tends to break or fracture along definite direction which is characteristic of a simple. This is called Cleavage Allotropy Isotropy None of these
39 The smallest portion of a crystal lattice that if repeated in three-dimensions will generate the entire lattice is called: Unit cell Lattice plane Crystal None of these
40 A regular, repetitive, three-dimensional pattern of points, which represent the position of molecules, atoms or ions in the crystal, is called: Unit cell Space lattice Crystal None of these
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