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IIT JEE (Advanced) 2020 : Paper 2 in English (Solved with Answer Key)

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JEE (Advanced) 2020 Paper 2 Q.1 A large square container with thin transparent vertical walls and filled with water 4 (refractive index 3) is kept on a horizontal table. A student holds a thin straight wire vertically inside the water 12 cm from one of its corners, as shown schematically in the figure. Looking at the wire from this corner, another student sees two images of the wire, located symmetrically on each side of the line of sight as shown. The separation (in cm) between these images is ____________. Q.2 A train with cross-sectional area is moving with speed inside a long tunnel of cross-sectional area 0 ( 0 = 4 ). Assume that almost all the air (density ) in front of the train flows back between its sides and the walls of the tunnel. Also, the air flow with respect to the train is steady and laminar. Take the ambient pressure and that inside the train to be 0 . If the pressure in the region between the 7 sides of the train and the tunnel walls is , then 0 = 2 2 . The value of is ________. 1/9

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