NEET Physics Units And Measurement Conversion Of Units For One System To Another MCQs

A protein molecule's diameter is measured as 42 Å using X-ray diffraction. If another measurement instrument gives the diameter in picometers (pm), and the ratio of the two measurements is $\frac{x}{10}$, what is the value of $x$?

The ionization energy of hydrogen is 13.6 eV. Express this energy in joules per mole using the following conversions: 1 eV = $1.602 imes 10^{-19}$ J and Avogadro's number = $6.022 imes 10^{23}$ $mol^{-1}$.

The density of a substance is given as 0.8 g/$cm^3$. Convert this density to kg/$m^3$.

The Planck constant is $6.626 imes 10^{-34}$ J s. Express this in units of eV s (electron-volt seconds), given 1 eV = $1.602 imes 10^{-19}$ J.

The dimensions of universal gravitational constant are

The dimension of $\frac{1}{{\sqrt {{\varepsilon _0}{\mu _0}} }}$ is that of

$\left[ {M{L^2}{T^{ - 3}}} \right]$ is the dimension of

What are the units of $K = 1/4\pi {\varepsilon _0}$

The fundamental physical quantities that have same dimensions in the dimensional formulae of torque and angular momentum are

The dimensional formula for Boltzmann’s constant is