JEE Advanced 2025 Physics question
Consider a star of mass kg revolving in a circular orbit around another star of mass kg with . The heavier star slowly acquires mass from the lighter star at a constant rate of γ kg/s. In this transfer process, there is no other loss of mass. If the separation between the centers of the stars is r, then its relative rate of change (in s⁻¹) is given by:
Answer: (B)
Solution
Status: BONUS / MARKS TO ALL. Mathematical status: none of the options is correct. The mass transfer is internal, so the orbital angular momentum (with constant) is conserved, i.e. is constant. With , :
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