Practice question

ΔV = −GMEm(1r2−1r1). r1 = 5.12×107m, r2 = 1.024×108m. ΔV = −6.67×10−11×6×1024×8(11.024×108−15.12×107). ΔV = −3.202×1015(−9.766×10−9)≈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.