Out of following four dimensional quantities, which one quantity is to be called a dimensional const

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1.Units, Dimensions and Measurement

easy

Out of following four dimensional quantities, which one quantity is to be called a dimensional constant

AAcceleration due to gravity

BSurface tension of water

CWeight of a standard kilogram mass

DThe velocity of light in vacuum

Solution

Acceluation dueto gravity changelas we move on surface of earth.
Swrface tension of water varies with temperetore. standard kgis defined mannally. Velocity of light is constant $3 \times 10^{8 . m / s }$.

Standard 11

Physics

If e is the electronic charge, $c$ is the speed of light in free space and $h$ is Planck's constant, the quantity $\frac{1}{4 \pi \varepsilon_{0}} \frac{| e |^{2}}{h c}$ has dimensions of …….

hard

(JEE MAIN-2021)

If $\mathrm{E}$ and $\mathrm{G}$ respectively denote energy and gravitational constant, then $\frac{\mathrm{E}}{\mathrm{G}}$ has the dimensions of :

medium

(NEET-2021)

The dimension of quantity $\frac{L}{RCV}$ is