question_answer

The mass density of a spherical body is given by \[\rho (r)\,=\frac{k}{r}\] for \[r\le R\] and \[\rho \,(r)=0\] for \[r>R,\] Where r is the distance from the centre. The correct graph that describes qualitatively the acceleration, a, of a test particle as a function of r is -                                                                                      [JEE Online 09-04-2017]

A)  

B)        C)   D)        Correct Answer: A Solution : [a]

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