The difference in the variation of resistance with temperature in a metal and a semiconductor arises essentially due to the difference in the (A) crystal structure (B) variation of the number of charge carries with temperature (C) type of bonding (D) variation for scattering mechanism with temperature. ?

in a physics laboratory a block x is balanced by a block Y of mass 200 kg,each are suspended from a balance of equal lever arms .the scale pan on X is at a height.H1=2 cm ,where as scale pan on Y is at height 1 cm above the floor.the error in weighing is (in gram)

consider the figure of a single riveted lap joint as follows

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cyclic heat engine operates between. temperature of 30 C. What is the least rate of heat rejection per kW net output of an engine. source temperature of 800 C and sink

 

 

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