Physics In severe winter, in cold countries water pipes burst because Water expands on freezing Contraction of water pipes Combined effect of all the above three High atmospheric pressure Water expands on freezing Contraction of water pipes Combined effect of all the above three High atmospheric pressure ANSWER DOWNLOAD EXAMIANS APP
Physics A cup of hot coffee is placed on a metal table in a room. By which of the following methods does it lose heat? Convection and radiation only Conduction and radiation only Conduction, convection and radiation Conduction and convection only Convection and radiation only Conduction and radiation only Conduction, convection and radiation Conduction and convection only ANSWER DOWNLOAD EXAMIANS APP
Physics A piece of wood is held under water. The upthrust on it will be: Equal to the weight of the wood Less than weight of the wood Zero More than weight of the wood Equal to the weight of the wood Less than weight of the wood Zero More than weight of the wood ANSWER DOWNLOAD EXAMIANS APP
Physics A potentiometer wire is 100 cm long and a constant potential difference is maintained across it. Two cells are connected in series first to support one another and then in opposite direction. The balance points are obtained at 50 cm and 10 cm from the positive end of the wire in the two cases. The ratio of the emf's is : 0.12777777777778 0.12638888888889 0.21111111111111 0.20902777777778 0.12777777777778 0.12638888888889 0.21111111111111 0.20902777777778 ANSWER DOWNLOAD EXAMIANS APP
Physics The safest hammers are those with heads that are Welded and alloyed Alloy and drop-forged steel Cast steel and chiseled Chiseled and drop forged Welded and alloyed Alloy and drop-forged steel Cast steel and chiseled Chiseled and drop forged ANSWER DOWNLOAD EXAMIANS APP
Physics Water cannot be used to extinguish fire caused by electric current, because It may cause electrolysis It may cause hydrolysis It may cause electrocution It may spoil the wiring It may cause electrolysis It may cause hydrolysis It may cause electrocution It may spoil the wiring ANSWER DOWNLOAD EXAMIANS APP
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