Practice question

ΔV = −GMEm(1r2−1r1). r1 = 1.92×107m, r2 = 3.84×107m. ΔV = −6.67×10−11×6×1024×4(13.84×107−11.92×107). ΔV = −1.601×1015(−2.604×10−8)≈4.17×107J. As per NCERT, applying relevant law/formula with correct units and sign convention leads to 4.2 × 10⁷ J. This satisfies dimensional consistency and physical conditions given, so option C is scientifically correct.