[{"id":212418,"question":"An important application of the semi conductor is the","choices":[{"text":"Vacuum tube","value":"A"},{"text":"Fluroescent tube","value":"B"},{"text":"Copper oxide rectifier","value":"C"},{"text":"Battery","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":212417,"question":"Lagging of magnetic flux density behind magnetic field is known as.","choices":[{"text":"Permeability","value":"A"},{"text":"Susceptibility","value":"B"},{"text":"Hysteresis","value":"C"},{"text":"Uncertainty","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":212416,"question":"Materials that experience a force from stronger to weaker regions of magnetic field are called.","choices":[{"text":"Non magnetic","value":"A"},{"text":"Paramagnetic","value":"B"},{"text":"Ferromagnetic","value":"C"},{"text":"Diamagnetic","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":212415,"question":"A material in which resultant magnetic moment is zero.","choices":[{"text":"Diamagnetic","value":"A"},{"text":"Paramagnetic","value":"B"},{"text":"Ferromagnetic","value":"C"},{"text":"Anti ferromagnetic","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":212414,"question":"In a crystal lattice","choices":[{"text":"Atoms are arranged in an order way","value":"A"},{"text":"Atoms are arranged in a random way","value":"B"},{"text":"Holes are arranged in an order way","value":"C"},{"text":"Electrons are arranged in an order way","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":212413,"question":"The permeability of a diamagnetic material is","choices":[{"text":"Greater than unity","value":"A"},{"text":"Less than unity","value":"B"},{"text":"Equal to unity","value":"C"},{"text":"Zero","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":212412,"question":"Which of the following has teh maximum permeability.","choices":[{"text":"Paramagnetic substances","value":"A"},{"text":"Ferromagnetic substances","value":"B"},{"text":"Diamagnetic substances","value":"C"},{"text":"Iron oxide","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":212411,"question":"Which of the following is not a ferromagnetic materials.","choices":[{"text":"Iron","value":"A"},{"text":"steel","value":"B"},{"text":"Copper","value":"C"},{"text":"Cobalt","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":212410,"question":"When impurities are added to metals they","choices":[{"text":"Will decrease the elasticity","value":"A"},{"text":"Will increases the elasticity","value":"B"},{"text":"Will not change the elasticity","value":"C"},{"text":"Will or will not change the elasticity","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":212409,"question":"Which of the following is an example of diamagnetic substances.","choices":[{"text":"Nickel","value":"A"},{"text":"Chromium","value":"B"},{"text":"Antimony","value":"C"},{"text":"Cobalt","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":212408,"question":"Super conductor are used in","choices":[{"text":"Fast computer chips","value":"A"},{"text":"Magnetic resonance imaging","value":"B"},{"text":"Magnetic levitation trains","value":"C"},{"text":"All of the above","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":212407,"question":"A well known example of an intrinsic semi conductors is.","choices":[{"text":"Germanium","value":"A"},{"text":"Phosphorus","value":"B"},{"text":"Cobalt","value":"C"},{"text":"Aluminium","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":212406,"question":"The materials whose resistivity becomes zero below a certain temperature.","choices":[{"text":"Semi conductors","value":"A"},{"text":"Super conductors","value":"B"},{"text":"Insulators","value":"C"},{"text":"conductors","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":212405,"question":"Such substance which undergo plastic deformation until they break are known as.","choices":[{"text":"Diatomic substances","value":"A"},{"text":"Monoatomic substances","value":"B"},{"text":"Ductile substances","value":"C"},{"text":"Brittle substances","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":212404,"question":"The doped semi conductor materials are called","choices":[{"text":"Pure semi conductors","value":"A"},{"text":"Poor semi conductors","value":"B"},{"text":"Super conductors","value":"C"},{"text":"Extrinsic semiconductors","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":212403,"question":"A substance which has empty conduction band.","choices":[{"text":"Insulator","value":"A"},{"text":"Conductor","value":"B"},{"text":"Semi conductor","value":"C"},{"text":"super conductor<div><br></div>","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":212402,"question":"Artificial polymers are made by a chemical reaction known as.","choices":[{"text":"Crystallization","value":"A"},{"text":"Electroplating","value":"B"},{"text":"Polymerization","value":"C"},{"text":"Polarization","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":212401,"question":"Which one of the following solids exhibits only shot range order.","choices":[{"text":"Amorphous solids","value":"A"},{"text":"Polymeric solids","value":"B"},{"text":"Crystalline solids","value":"C"},{"text":"Metals","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":212400,"question":"Amorphous solids are also called","choices":[{"text":"Crystalline solids","value":"A"},{"text":"Glassy solide","value":"B"},{"text":"super conductors","value":"C"},{"text":"Polymeric solids","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":212399,"question":"When a pentavalent material like arsenic is added to a tetravalent material such as germanium, we get a.","choices":[{"text":"n-type material","value":"A"},{"text":"p -type material","value":"B"},{"text":"diode","value":"C"},{"text":"super conductor","value":"D"},{"value":"E"}],"correctAnswer":1}]