The magnetic flux through a loop of resistance 10 ? is given by f = 5t2– 4t + 1 Weber. How much current is induced in the loopafter 0.2 sec ?(A) 0.4 A (B) 0.2 A (C) 0.04 A (D) 0.02 A

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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