A spherically symmetric gravitational system of particles has where \( \rho_{0} \) is a constant...

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A spherically symmetric gravitational system of particles has where \( \rho_{0} \) is a constant. A test mass can undergo circular motion under the influence of the gravitational field of particles. Its speed \( v \) as a function of distance \( r(0r\infty) \) from the centre of the system is represented by [IIT-JEE 2008]
(c)
(d)
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