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1. units,dimensions and measurement — Physics STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 SciencePhysics1. units,dimensions and measurement1 Mark
MCQ
$SI$ unit of pressure is
  • ✓
    Pascal
  • B
    $Dynes/c{m^2}$
  • C
    $cm\,$ of $Hg$
  • D
    Atmosphere
✓

Answer

Correct option: A.
Pascal
a
The SI unit of pressure is pascal (represented as $Pa$) which is equal to one newton per square metre $\left( N / m ^2\right.$ or $kg m ^{-1} s ^{-2}$ ). Interestingly, this name was given in $1971$ . Before that pressure in $SI$ was measured in $newtons$ $per$ $square$ $metre$.

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