Physics · 2014
JEE Main · 12 April 2014, Shift 1 · Q1
From the following combinations of physical constants (expressed through their usual symbols) the only combination, that would have the same value in…
From the following combinations of physical constants (expressed through their usual symbols) the only combination, that would have the same value in different systems of units, is :
Official answer
(2)
$\displaystyle \frac{\mathrm{e}^2}{2 \pi \epsilon_{\mathrm{o}} \mathrm{Gm}_{\mathrm{e}}^2}\left(\mathrm{~m}_{\mathrm{e}}=\text { mass of electron }\right)$
More from Units and Dimensions
- The de-Broglie wavelength associated with a particle of mass m and energy E is h / √(2 m E). The dimensional formula for Planck's constant is:2024
- If E and H represents the intensity of electric field and magnetising field respectively, then the unit of E/H will be:2021
- If B is magnetic field and μ_0 is permeability of free space, then the dimensions of (B / μ_0) is2025
- L, C and R represents physical quantities inductance, capacitance and resistance respectively. The dimensional formula M L^2 T^-4 A^-2 corresponds to…2026
- If current ( I ), kinetic energy ( K ) and charge ( Q ) are taken as the fundamental quantities, The dimensional representation of power will be:2022
- If the velocity of light c, universal gravitational constant G and Planck's constant h are chosen as fundamental quantities. The dimensions of mass…2023
- A quantity f is given by f=√((hc^5)/G) where c is speed of light, G universal gravitational constant and h is the Planck's constant. Dimension of f…2020
- A quantity x is given by ( IF v^2 / WL^4 )in terms of moment of inertia I, force F, velocity v, work W and Length L. The dimensional formula for x is…2020
JEE Main 2014 Physics question, with the answer from NTA’s final answer key. Where our answers come from.