Practice question

ΔV = −GMEm(1r2−1r1). r1 = 5.76×107m, r2 = 1.152×108m. ΔV = −6.67×10−11×6×1024×9(11.152×108−15.76×107). ΔV = −3.602×1015(−8.681×10−9)≈3.13×107J. As per NCERT, applying relevant law/formula with correct units and sign convention leads to 3.1 × 10⁷ J. This satisfies dimensional consistency and physical conditions given, so option B is scientifically correct.