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PHYSICSSection - ISingle Correct Choice TypeThis section contains 7 multiple choice questions. Each question has 4 choices (A), (B), (C) and (D) for its answer, out of whichONLY ONEis correct.Q47A block is released from the top of a smooth fixed inclined plane. The minimum time taken to reach the bottom isABCDQ48Which of the following function(s) ofxandtrepresents a progressive wave?Ay= sin(4t 3x)By=Cy =DAll of theseQ49A satellite is projected from a height equal to 2Rfrom surface of earth (R= radius of earth). The minimum energy of satellite so as not to fall on the surface isEandE' is the total energy to make it revolve in circular orbit. The value ofisABCD2Q50The type of motion exhibited by the arrangement shown isAPure translatoryBPure oscillatoryCTranslatory + oscillatoryDCannot predictQ51A spherical water container of radius 10 m is half-filled with water. The container is given a horizontal acceleration of 10 m/s2. The maximum value of pressure in the sphere isA1 atmB1.4 atmC3.4 atmD2.4 atmQ52In which of the following cases net extension/compressi

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