Physical Quantities

What is the relative magnetic Permeability of aluminium? ${\mu }_A= 1.256\times {10}^{-6} \mathrm{H}/\mathrm{m}$ , ${\mu }_0= 1.257{ \times 10}^{-6} \mathrm{H}/\mathrm{m}.$

What is relative electric permittivity in glass, if permittivity of glass is ${\epsilon }_g=3.7\times {10}^{-12}?$

permittivity of vacuum ${\epsilon }_0= 8.85\times {10}^{-12}$.

Find the relative quantity of the substance x.

Density of x = $300 kg/m^3$ And reference density = $200 kg/m^3$.

${\mathrm{m}}^3$ is an example of fundamental units.

Why length, mass and time are chosen as base quantities in mechanics?

Write the fundamental unit of amount of substance.

Write the fundamental unit of electric current.

Physical quantities are classified into two- fundamental and _____ quantities. 

The fundamental unit of mass is kilogram which is the mass of a platinum-iridium cylinder kept at the International Bureau of Weights and Measures near Paris in France.

The quantity which can be measured is known as a physical quantity. They have a numerical magnitude and a unit.

Second is an example of fundamental units.

Time is an example of fundamental quantities.

Length, mass and time are examples of fundamental quantities.

Units which are expressed in terms of fundamental units or those units which are dependent on fundamental units are called _____ (standard / derived) units.

Units which are expressed in terms of fundamental units or those units which are dependent on fundamental units are called _____ units.

Quantities other than base quantities are called as

Which of the following options correctly represents the unit of potential energy?

$1$ light year is equal to

Light year is the unit of

The distance of a galaxy from the earth is of the order of ${10}^{25} \mathrm{m}$. The time taken by light to reach the earth from the galaxy is