[{"id":127613,"question":"The ratio of stress/strain is called as","choices":[{"text":"Modulus of elasticity","value":"A"},{"text":"Bulk modulus","value":"B"},{"text":"Shear modulus","value":"C"},{"text":"Young's modulus","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":127611,"question":"The ratio of linear stress/linear strain is called as","choices":[{"text":"Young's modulus","value":"A"},{"text":"Bulk modulus","value":"B"},{"text":"Shear modulus","value":"C"},{"text":"Modulus","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":127600,"question":"The strain is the ratio of","choices":[{"text":"Stress/strain","value":"A"},{"text":"Strain/stress","value":"B"},{"text":"Force area","value":"C"},{"text":"change in length/original length","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":127598,"question":"The deformation measured in terms of some twisting angle due to action of stress is known as","choices":[{"text":"Stress","value":"A"},{"text":"Linear stress","value":"B"},{"text":"Compressive stress","value":"C"},{"text":"Shear stress","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":127597,"question":"The stress which increase the length in one dimension only is called","choices":[{"text":"length stress","value":"A"},{"text":"only have compressive stress","value":"B"},{"text":"Have both tensile and compression stress","value":"C"},{"text":"None of them","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":127596,"question":"A solid subjected to deformation along one dimension","choices":[{"text":"Only have tensile stress","value":"A"},{"text":"Only have compressive stress","value":"B"},{"text":"Have both tensile and compressive stress","value":"C"},{"text":"None of them","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":127594,"question":"The measure of deformation in a certain solid due to the action of stress is called","choices":[{"text":"Hooke's law","value":"A"},{"text":"Mechanical advantage","value":"B"},{"text":"Stress","value":"C"},{"text":"Strain","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":127593,"question":"The ability of anybody to return, to its original shape is called","choices":[{"text":"Elasticity","value":"A"},{"text":"Elastic force","value":"B"},{"text":"Stress","value":"C"},{"text":"Strain","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":127592,"question":"A wire of 100 mm length and 1 mm<sup>2</sup>surface area stretches 10 mm under a load of 60 N. A second wire of same material, with half the diameter of the first wire is stretched by the same load. What is the extension in the second wire?","choices":[{"text":"20 mm","value":"A"},{"text":"30 mm","value":"B"},{"text":"40 mm","value":"C"},{"text":"50 mm","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":127590,"question":"The young modulus of steel is greater than that of aluminium.<div>Keeping the statement above in mind state which of the following is true</div>","choices":[{"text":"Steel requires a larger stress on it for a given strain than does aluminium","value":"A"},{"text":"Aluminium requires more force than steel does to get a similar extension as steel","value":"B"},{"text":"Steel requires less force than aluminium does to get a similar extension as aluminium","value":"C"},{"text":"Steel requires a larger strain on it for a given stress than does aluminium","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":127586,"question":"The high-tensile steel used to support the roadway of a suspension bridge breaks under a stress of 2 x 10<sup>9</sup>Pa. Find the minimum cross-sectional area for a cable if it is to support a load of mass 2 x 10<sup>5</sup>kg.<div>(g = 10 N kg<sup>-1</sup>)</div>","choices":[{"text":"10<sup>-2</sup>m<sup>2</sup>","value":"A"},{"text":"10<sup>-1</sup>m<sup>2</sup>","value":"B"},{"text":"10<sup>-4</sup>m<sup>2</sup>","value":"C"},{"text":"10<sup>-3</sup>m<sup>2</sup>","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":127582,"question":"Which of the following pair of quantities do not have the same units?","choices":[{"text":"Stress, Young's modulus","value":"A"},{"text":"Strain, bulk modulus","value":"B"},{"text":"Stress, bulk modulus","value":"C"},{"text":"None of them","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":127579,"question":"A rubber cord 100 cm long is elongated 1 cm by a stretching force of 0.2 N. The cross-sectional area of the cord is 0.04 cm<sup>2</sup>. Find the Young's modulus for that rubber.","choices":[{"text":"0.5 N cm<sup>-2</sup>","value":"A"},{"text":"0.05 N cm<sup>-2</sup>","value":"B"},{"text":"50 N cm<sup>-2</sup>","value":"C"},{"text":"500 N cm<sup>-2</sup>","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":127577,"question":"Which of the following pair of quantities have the same units?","choices":[{"text":"stress, Young's modulus","value":"A"},{"text":"Young's modulus, bulk modulus","value":"B"},{"text":"Stress, bulk modulus","value":"C"},{"text":"All of them","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":127576,"question":"220 cm<sup>3</sup>of water, when subjected to a stress of 100 atmosphere, becomes 219 cm<sup>3</sup>. Find the bulk modulus of water","choices":[{"text":"100 N m<sup>-3</sup>","value":"A"},{"text":"100 N m<sup>-2</sup>","value":"B"},{"text":"22000 N m<sup>-3</sup>","value":"C"},{"text":"22000 N m<sup>-2</sup>","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":127574,"question":"What is the bulk modulus of a material?","choices":[{"text":"strain/volumetric strain","value":"A"},{"text":"volumetric stress/strain","value":"B"},{"text":"stress/volumetric strain","value":"C"},{"text":"volumetric stress/volumetric strain","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":127573,"question":"What is the Young modulus of a meta?","choices":[{"text":"Extension/force","value":"A"},{"text":"Force/extension","value":"B"},{"text":"Strain/stress","value":"C"},{"text":"Stress/strain","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":127571,"question":"What is the unit of the Young's modulus?","choices":[{"text":"N m<sup>-2</sup>","value":"A"},{"text":"N m<sup>-1</sup>","value":"B"},{"text":"N m","value":"C"},{"text":"N m<sup>2</sup>","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":127570,"question":"The cores of electromagnets used for alternating currents where the specimen repeatedly undergoes magnetization and demagnetization should have","choices":[{"text":"broad hysteresis curves","value":"A"},{"text":"narrow hysteresis curves","value":"B"},{"text":"any one of the them","value":"C"},{"text":"none of them","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":127569,"question":"To make a permanent magnet, a material should have","choices":[{"text":"hihg retentivety and small coercive force","value":"A"},{"text":"low retentivety and high coercive force","value":"B"},{"text":"low retentivety and small coercive force","value":"C"},{"text":"high retentivety and high coercive force","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":127568,"question":"The energy dissipated per cycle for iron in hysteresis loop is","choices":[{"text":"less than for steel","value":"A"},{"text":"equal to the steel","value":"B"},{"text":"more than the steel","value":"C"},{"text":"any one of them","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":127567,"question":"The coercivity of the steel is","choices":[{"text":"less than the iron","value":"A"},{"text":"equal to the iron","value":"B"},{"text":"more than the iron","value":"C"},{"text":"any one of them","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":127566,"question":"In the hysteresis loop, when the current is reduced to zero, the material","choices":[{"text":"does not retain magnetism","value":"A"},{"text":"retains not retain magnetism","value":"B"},{"text":"retains strong magnetism","value":"C"},{"text":"none of them","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":127564,"question":"In the phenomenon of hysteresis.","choices":[{"text":"magnetism leads the magnetising current","value":"A"},{"text":"magnetism lags behind the magnetising current","value":"B"},{"text":"magnetism goes along the magnetising current","value":"C"},{"text":"none of them","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":127561,"question":"The curie temperature of iron is called","choices":[{"text":"250<span style=\"font-weight: bold; color: rgb(106, 106, 106); font-family: arial, sans-serif; font-size: small;\">°C</span>","value":"A"},{"text":"500<span style=\"font-weight: bold; color: rgb(106, 106, 106); font-family: arial, sans-serif; font-size: small;\">°</span><span style=\"color: rgb(106, 106, 106); font-family: arial, sans-serif; font-size: small;\">C</span>","value":"B"},{"text":"750<span style=\"font-weight: bold; color: rgb(106, 106, 106); font-family: arial, sans-serif; font-size: small;\">°C</span>","value":"C"},{"text":"1000<span style=\"font-weight: bold; color: rgb(106, 106, 106); font-family: arial, sans-serif; font-size: small;\">°C</span>","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":127558,"question":"Above the curie temperature, iron becomes","choices":[{"text":"ferromagnetic","value":"A"},{"text":"paramagnetic","value":"B"},{"text":"diamagnetic","value":"C"},{"text":"any one of them","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":127556,"question":"Ferromagnetic substances lose their magnetism when heated above a certain temperature, known as","choices":[{"text":"critical temperature","value":"A"},{"text":"curie temperature","value":"B"},{"text":"high temperature","value":"C"},{"text":"fixed temperature","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":127555,"question":"Which of the following can become a good temporarily magnet?","choices":[{"text":"iron","value":"A"},{"text":"steel","value":"B"},{"text":"both of them","value":"C"},{"text":"none of them","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":127553,"question":"Which of the following can become a good permanent magnet?","choices":[{"text":"iron","value":"A"},{"text":"steel","value":"B"},{"text":"both of them","value":"C"},{"text":"none of them","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":127550,"question":"In a soft iron, domains are","choices":[{"text":"easily oriented along external field and do not return to original random positions","value":"A"},{"text":"easily oriented along external field and readily returns to originally random positions","value":"B"},{"text":"do not oriented along external field and also do not returns to original random position","value":"C"},{"text":"none of them","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":127547,"question":"Within each domain, the magnetic fields of all the spinning electrons are","choices":[{"text":"parallel","value":"A"},{"text":"antiparallel","value":"B"},{"text":"perpendicular","value":"C"},{"text":"all of them","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":127544,"question":"The size of the domains in such that they can contain","choices":[{"text":"10<sup>2</sup>to 10<sup>4</sup>atoms","value":"A"},{"text":"10<sup>4</sup>to 10<sup>8</sup>atoms","value":"B"},{"text":"10<sup>8</sup>to 10<sup>12</sup>atoms","value":"C"},{"text":"10<sup>12</sup>to 10<sup>16</sup>atoms","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":127541,"question":"The domains are of macroscopic size of the order of","choices":[{"text":"centimetres","value":"A"},{"text":"metres","value":"B"},{"text":"millimetres","value":"C"},{"text":"nanometres","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":127538,"question":"Recent studies of ferromagnetism have shown that there exists in ferromagnetic substances small regions called","choices":[{"text":"tiny regions","value":"A"},{"text":"domains","value":"B"},{"text":"vectors","value":"C"},{"text":"none of them","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":127536,"question":"Iron, cobalt and nickle are examples of","choices":[{"text":"diamagnetic substances","value":"A"},{"text":"ferromagnetic substances","value":"B"},{"text":"paramagnetic substances","value":"C"},{"text":"all of them","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":127535,"question":"The substances in which atoms cooperate with each other in such a way so as to exhibit a strong magnetic effect, are called","choices":[{"text":"diamagnetic substances","value":"A"},{"text":"ferromagnetic substances","value":"B"},{"text":"paramagnetic substances","value":"C"},{"text":"all of them","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":127534,"question":"The substances in which atoms are so oriented that the field produced by spin and orbital motion of the electrons might add up to zero, are called","choices":[{"text":"diamagnetic substances","value":"A"},{"text":"ferromagnetic substances","value":"B"},{"text":"paramagnetic substances","value":"C"},{"text":"all of them","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":127533,"question":"The substances in which, atom are so oriented that their field support each other and the atoms behave like tiny magnets, are called","choices":[{"text":"diamagnetic substances","value":"A"},{"text":"ferromagnetic substances","value":"B"},{"text":"paramagnetic substances","value":"C"},{"text":"all of them","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":127532,"question":"The charged nucleus of an atom itself spins, it's magnetic field","choices":[{"text":"equals the field produced by orbital electrons","value":"A"},{"text":"greater than the field produced by orbital electrons","value":"B"},{"text":"much weaker than the field produced by orbital electrons","value":"C"},{"text":"none of them","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":127531,"question":"An atom in which there is a resultant magnetic field, behaves like a tiny magnet and is called as","choices":[{"text":"magnetic","value":"A"},{"text":"magnetic dipole","value":"B"},{"text":"magnetic monopole","value":"C"},{"text":"none of them","value":"D"},{"value":"E"}],"correctAnswer":2}]