1.

A planet of mass .m. moves in an elliptical orbit around an unknown star of mass .M. such that its maximum and minimum distances from the star are equal to r_1 and r_2respectively. The angular momentum of the planet relative to the centre of the star is

Answer»

`msqrt((2GMr_1r_2)/(r_1+r_2))`
0
`msqrt((2GM(r_1+r_2))/(r_1r_2))`
`SQRT((2GMmr_1)/((r_1+r_2)r_2))`

ANSWER :A


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