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8. mechanical properties of solids — Physics STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 SciencePhysics8. mechanical properties of solids1 Mark
MCQ
The units of Young ‘s modulus of elasticity are
  • A
    $N{m^{ - 1}}$
  • B
    $N-m$
  • ✓
    $N{m^{ - 2}}$
  • D
    $N{\rm{ - }}{m^2}$
✓

Answer

Correct option: C.
$N{m^{ - 2}}$
c
Young's Modulus $=\frac{\text { stress }}{\text { strain }}=\frac{ ML ^{-1} T ^{-2}}{ L ^0}= M ^1 L ^{-1} T ^{-2}$

$\frac{\text { Force }}{\text { Area }}= N / m ^2$

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