Tag: fundamental and derived units

Questions Related to fundamental and derived units

Multiple choice physics measurements and units some examples of derived units fundamental and derived quantities fundamental and derived units

The SI unit of magnetic permeability is:

  1. ${ Am }^{ -1 }$
  2. ${ Am }^{ -2 }$
  3. ${ Hm }^{ -2 }$
  4. ${ Hm }^{ -1 }$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Magnetic permeability is a constant of proportionality that exists between magnetic induction and magnetic field intensity. 

In SI units, permeability is measured in henries per meter $H/m$ or $H m^{-1}$.
Multiple choice physics measurements and units some examples of derived units fundamental and derived quantities fundamental and derived units

Density is a ________ physical quantity.

  1. fundamental

  2. derived

  3. semi-derived

  4. semi-fundamental

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Density is calculated from mass and volume by the relation   $\rho = \dfrac{m}{V}$
Since, density depends on other fundamental quantity for its measurement.
So, density is a derived physical quantity.