All India Engineering / Architecture Entrance Examination (AIEEE)

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AIEEE 2009 Physics

Q.21. A long metallic bar is carrying heat from one of its ends to the other end under steady-state. The variation of temperature  along the length x of the bar from its hot end is best described by which of the following figures?

Sol: 

Answer: (3)

Q.22. Consider a rubber ball freely falling from a height h = 4.9 m onto a horizontal elastic plate. Assume that the duration of collision is negligible and the collision with the plate is totally elastic. Then the velocity as a function of time and the height as a function of time will be

Sol.:   Slope of velocity-time graph will remain constant except during collision where it will not be defined. Also variation of height with time will be parabolic.

Answer: (4)

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