1.

If a body describes a circular motion under inverse square field, the time taken to complete one revolution T is related to the radius of the circular orbit as [NCERT 1975; RPMT 2000]

A.             \[T\propto r\]   
B.             \[T\propto {{r}^{2}}\]
C.             \[{{T}^{2}}\propto {{r}^{3}}\]
D.               \[T\propto {{r}^{4}}\]
Answer» D.               \[T\propto {{r}^{4}}\]


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