Tag: measurement and measuring instrument

Questions Related to measurement and measuring instrument

Mass is a ....................... quantity.

physics measurement and measuring instrument measuring distance of celestial bodies unconventional units of measurements units of mass

  1. Scalar 

  2. Vector

  3. Tensor

  4. All

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Correct Option: A
Explanation:

Since the physical quantity mass has only magnitude but not direction, thus mass is a scalar quantity.

What is the value of $1  \ m $ in $\mathring{A}$?

physics measurement and measuring instrument measuring distance of celestial bodies unconventional units of measurements units of mass

  1. $10^{-10}$

  2. $10^{5}$

  3. $10^{7}$

  4. $10^{10}$

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Correct Option: D
Explanation:
$1 m = 10^{10} \mathring{A}$
or we can say 1 angstrom $=10^{-10} m$
The natural sciences and technology often uses angstrom to express sizes of atoms, molecules, microscopic biological structures, and lengths of chemical bonds, arrangement of atoms in crystals, wavelengths of electromagnetic radiation.

The number of fermi in $1$ meter is _____. 

physics measurement and measuring instrument measuring distance of celestial bodies unconventional units of measurements units of mass

  1. $10^{13}$

  2. $10^{14}$

  3. $10^{15}$

  4. $10^{16}$

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Correct Option: C
Explanation:

Since,  $1\ Fm={10}^{-15}m$


$\therefore$  $\cfrac{1}{{10}^{-15}}Fermi =1m$

${10}^{15}Fermi=1m$

The unit of atomic mass is

physics measurement and measuring instrument measuring distance of celestial bodies unconventional units of measurements units of mass

  1. mu

  2. kg

  3. amu

  4. g

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Correct Option: C
Explanation:

Atomic mass is the mass of an atom. An atomic mass unit (symbolized AMU or amu) is defined as precisely $\dfrac{1}{12}$ the mass of an atom of carbon-12.