Physics In a railway track, two rails are joined end to end with a gap in between them because Air-gaps are necessary for bearing the weight of running train Steel can be saved Accidents due to expansion in summer can be avoided Accidents due to contraction in winter can be avoided Air-gaps are necessary for bearing the weight of running train Steel can be saved Accidents due to expansion in summer can be avoided Accidents due to contraction in winter can be avoided ANSWER DOWNLOAD EXAMIANS APP
Physics It is difficult to cook rice At the top of a mountain Same anywhere Under a mine At the sea level At the top of a mountain Same anywhere Under a mine At the sea level ANSWER DOWNLOAD EXAMIANS APP
Physics Sprayer functions on Pascal's law Bernouli's principle Floatation principle Archemede's principle Pascal's law Bernouli's principle Floatation principle Archemede's principle ANSWER DOWNLOAD EXAMIANS APP
Physics Rainbow is seen after rain because of hanging molecules of water which act as Slabs Lenses Prisms Mirrors Slabs Lenses Prisms Mirrors ANSWER DOWNLOAD EXAMIANS APP
Physics In a Carnot engine when heat is taken from the source, its temperature Decreases and then remains constant Remains constant Increases Decreases Decreases and then remains constant Remains constant Increases Decreases ANSWER DOWNLOAD EXAMIANS APP
Physics Certain substances loose their electrical resistance completely at super low temperature. Such substances are called. Perfect conductors Dielectrics Superconductors Semi conductors Perfect conductors Dielectrics Superconductors Semi conductors ANSWER DOWNLOAD EXAMIANS APP