JEE Main 2026 Physics question
Dimensions of universal gravitational constant (G) in terms of Planck's constant (h), distance (L), mass (M) and time (T) are .
Answer: (B)
Solution
[G] = M⁻¹L³T⁻² and [h] = ML²T⁻¹. Option (B): [h][T⁻¹][L][M⁻²] = (ML²T⁻¹)(T⁻¹)(L)(M⁻²) = M⁻¹L³T⁻², matching [G] exactly.