[{"id":121097,"question":"In cause of YDS experiment, the distance between adjacent bright fringes is given by","choices":[{"text":"Δy =λL/d","value":"A"},{"text":"ΔY = L/λd","value":"B"},{"text":"ΔY =λ/L","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":121094,"question":"In YDS experiment, condition for constructive interference is that path difference is equal to","choices":[{"text":"nλ","value":"A"},{"text":"mλ","value":"B"},{"text":"(n + 1/2)λ","value":"C"},{"text":"(m + 1/2)λ","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":121092,"question":"Experimental demonstration of wave nature of light was given in 1801 by","choices":[{"text":"New ton","value":"A"},{"text":"Maxwell","value":"B"},{"text":"Thomas young","value":"C"},{"text":"Huygen","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":121090,"question":"In an interference pattern of Young,s Double Slit (YDS) experiment","choices":[{"text":"Bright fringes are wider than dark fringes","value":"A"},{"text":"Dark fringes are wider than bright fringes","value":"B"},{"text":"Both dark and bright fringes are of equally spaced","value":"C"},{"text":"Central fringes are wider than the outer fringes","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":121088,"question":"Phase change of 180° is equivalent to a path difference of","choices":[{"text":"2λ","value":"A"},{"text":"λ","value":"B"},{"text":"λ/2","value":"C"},{"text":"λ/4","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":121085,"question":"In case of destructive interference of two waves, the amplitude of the resultant wave will be ______ either of the waves","choices":[{"text":"Greater then","value":"A"},{"text":"Smaller then","value":"B"},{"text":"Equal to","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":121084,"question":"The path difference and phase difference are related to each other as","choices":[{"text":"Phase difference = (2π) x path difference","value":"A"},{"text":"Phase difference = (2π/λ) x path difference","value":"B"},{"text":"Phase difference = (λ/2) x path difference","value":"C"},{"text":"Phase difference = (2λ/π) x path difference","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":114698,"question":"The modulus of rigidity of a liquid is:","choices":[{"text":"Zero","value":"A"},{"text":"1","value":"B"},{"text":"Infinite","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":114697,"question":"The fractional change in volume per unit increase is pressure in called:","choices":[{"text":"Pressure coefficient","value":"A"},{"text":"Volume coefficient","value":"B"},{"text":"Bulk modulus","value":"C"},{"text":"Compressibitlity","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":114696,"question":"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:","choices":[{"text":"W/4","value":"A"},{"text":"W/2","value":"B"},{"text":"W","value":"C"},{"text":"2 W","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":114695,"question":"The results of mechanical tests are usually represents in terms of:","choices":[{"text":"Stress","value":"A"},{"text":"Strain","value":"B"},{"text":"Both A & B","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":114694,"question":"The reciprocal of bulk modulus is called:","choices":[{"text":"Shear modulus","value":"A"},{"text":"Elasticity","value":"B"},{"text":"Young's modulus","value":"C"},{"text":"Compressibility","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":114693,"question":"The atom or molecules in crystalline solids are held together by:","choices":[{"text":"Cohesive force","value":"A"},{"text":"Adhesive force","value":"B"},{"text":"Gravitational force","value":"C"},{"text":"Magnetic forces","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":114692,"question":"The smallest part of a crystal lattice is called:","choices":[{"text":"A molecule","value":"A"},{"text":"An atom","value":"B"},{"text":"A unit cell","value":"C"},{"text":"A particle","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":114690,"question":"Molecules of a solid possess:","choices":[{"text":"Translation motion","value":"A"},{"text":"Vibration motion","value":"B"},{"text":"Rotation motion","value":"C"},{"text":"Linear motion","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":114689,"question":"Which one of the following has only bulk modulus?","choices":[{"text":"Diamond","value":"A"},{"text":"Glass","value":"B"},{"text":"Tungsten","value":"C"},{"text":"Water","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":114688,"question":"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:","choices":[{"text":"40 ton","value":"A"},{"text":"80 ton","value":"B"},{"text":"160 ton","value":"C"},{"text":"5 ton","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":114687,"question":"If a wire is stretched to double of its length then the strain will be","choices":[{"text":"1","value":"A"},{"text":"0.5","value":"B"},{"text":"2","value":"C"},{"text":"0","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":114685,"question":"What is the SI unit of Tensile strain?","choices":[{"text":"Nm-2","value":"A"},{"text":"Jm-2","value":"B"},{"text":"Nm-1","value":"C"},{"text":"Being a number, it has no unit","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":114684,"question":"Which of the following substances possesses the highest elasticity?","choices":[{"text":"Al","value":"A"},{"text":"Copper","value":"B"},{"text":"Steel","value":"C"},{"text":"Rubber","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":114682,"question":"The SI unit of stress is same as that of.","choices":[{"text":"Momentum","value":"A"},{"text":"Pressure","value":"B"},{"text":"Force","value":"C"},{"text":"Length","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":114681,"question":"Which of the following is an example of Brittle substances?","choices":[{"text":"Copper and Brass","value":"A"},{"text":"Brass and glass","value":"B"},{"text":"Copper and glass","value":"C"},{"text":"Only glass","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":114680,"question":"The value of young modulus in Nm-2for water is","choices":[{"text":"70 x 10","value":"A"},{"text":"2.2 x 105","value":"B"},{"text":"Zero","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":114679,"question":"The temperature below which materials are superconductor is called as:","choices":[{"text":"Kelvin temperature","value":"A"},{"text":"Critical temperature","value":"B"},{"text":"Curie temperature","value":"C"},{"text":"none of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":114678,"question":"Shear stress addresses to the:","choices":[{"text":"Volume changes due to the applied stress","value":"A"},{"text":"Shape changes due to the applied stress","value":"B"},{"text":"Length changes due to the applied stress","value":"C"},{"text":"All of the above","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":114677,"question":"After elastic limit the shape of graph is","choices":[{"text":"Curved","value":"A"},{"text":"Straight Line","value":"B"},{"text":"Saw tooth","value":"C"},{"text":"Arbitrary","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":114676,"question":"Stree is _________ property of solids
","choices":[{"text":"Electrical","value":"A"},{"text":"Polymeric","value":"B"},{"text":"Conductive","value":"C"},{"text":"Mechanical","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":114675,"question":"The maximum stress that a body can tolerate is called","choices":[{"text":"UTS","value":"A"},{"text":"Permanent stress","value":"B"},{"text":"Elastic strength","value":"C"},{"text":"Plastic stress","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":114674,"question":"S.I unit of stress is","choices":[{"text":"N/m","value":"A"},{"text":"N m","value":"B"},{"text":"Nm-2","value":"C"},{"text":"newton","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":114673,"question":"Stress may be","choices":[{"text":"Tensile","value":"A"},{"text":"Compressive","value":"B"},{"text":"Shear","value":"C"},{"text":"All of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":114672,"question":"Bulk modulus is involved when the deformation is","choices":[{"text":"One dimensional","value":"A"},{"text":"Two dimensional","value":"B"},{"text":"Three dimensional","value":"C"},{"text":"All of these","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":114667,"question":"The electrons, which can wander in the solid, are known as:","choices":[{"text":"Valence electron","value":"A"},{"text":"Free electron","value":"B"},{"text":"Loosely bound electrons","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":114665,"question":"________ is a pattern which has got one more atom at the centre of a simple cube.","choices":[{"text":"Simple cube","value":"A"},{"text":"Face centered cube","value":"B"},{"text":"Body centered cube","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":114659,"question":"__________ is a cubic pattern having one extra atom or molecule at the centre of each of the six faces of the cube","choices":[{"text":"Simple cube","value":"A"},{"text":"Face centered cube","value":"B"},{"text":"Body centered cube","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":114657,"question":"In a crystal the density of atoms or molecules does not vary from direction to direction. This is known as:","choices":[{"text":"Cleavage","value":"A"},{"text":"Anisotropy","value":"B"},{"text":"Homogeneity","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":114655,"question":"If one atom or molecule lies out each of the eight corners of a cube, it is called","choices":[{"text":"Simple cube","value":"A"},{"text":"Face centered cube","value":"B"},{"text":"Body centered cube","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":114653,"question":"The property due to which the size or shape of a lattice is not important is called","choices":[{"text":"Cleavage","value":"A"},{"text":"Anisotropy","value":"B"},{"text":"Homogenity","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":114651,"question":"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","choices":[{"text":"Cleavage","value":"A"},{"text":"Allotropy","value":"B"},{"text":"Isotropy","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":114650,"question":"The smallest portion of a crystal lattice that if repeated in three-dimensions will generate the entire lattice is called:","choices":[{"text":"Unit cell","value":"A"},{"text":"Lattice plane","value":"B"},{"text":"Crystal","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":114636,"question":"A regular, repetitive, three-dimensional pattern of points, which represent the position of molecules, atoms or ions in the crystal, is called:","choices":[{"text":"Unit cell","value":"A"},{"text":"Space lattice","value":"B"},{"text":"Crystal","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":1}]