What is unit ? What are fundamental unit and derived unit.
What is unit ? What are fundamental unit and derived unit.
Comparison with certain basic internationally accepted reference standard is called unit.
- Measurement of physical quantity is expressed by number accompanied by a unit.
- Although number of physical quantities are very large we need only limited no. of units for expressing all physical quantities. Since they are interrelated with one another.
- The unit for fundamental or base quantities are called fundamental or base unit.
- Physical quantities which are expressed as combination of fundamental quantities are called derived quantities and their unit are called derived unit.
Similar Questions
One atomic mass units is equivalent to .............. $MeV$ energy.
One atomic mass units is equivalent to .............. $MeV$ energy.
What is the $SI$ unit of permeability
What is the $SI$ unit of permeability
The $SI$ unit of the inductance, the henry cannot be written as
The $SI$ unit of the inductance, the henry cannot be written as
Match List$-I$ with List$-II$.
List$-I$
List$-II$
$(a)$ ${R}_{{H}}$ (Rydberg constant)
$(i)$ ${kg} {m}^{-1} {s}^{-1}$
$(b)$ $h$ (Planck's constant)
$(ii)$ ${kg} {m}^{2} {s}^{-1}$
$(c)$ $\mu_{{B}}$ (Magnetic field energy density)
$(iii)$ ${m}^{-1}$
$(d)$ $\eta$ (coefficient of viscocity)
$(iv)$ ${kg} {m}^{-1} {s}^{-2}$
Choose the most appropriate answer from the options given below:
Match List$-I$ with List$-II$.
| List$-I$ | List$-II$ |
| $(a)$ ${R}_{{H}}$ (Rydberg constant) | $(i)$ ${kg} {m}^{-1} {s}^{-1}$ |
| $(b)$ $h$ (Planck's constant) | $(ii)$ ${kg} {m}^{2} {s}^{-1}$ |
| $(c)$ $\mu_{{B}}$ (Magnetic field energy density) | $(iii)$ ${m}^{-1}$ |
| $(d)$ $\eta$ (coefficient of viscocity) | $(iv)$ ${kg} {m}^{-1} {s}^{-2}$ |
Choose the most appropriate answer from the options given below:
- [JEE MAIN 2021]
$Joule-second$ is the unit of
$Joule-second$ is the unit of