The dimensional formula for the modulus of

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The dimensional formula for the modulus of rigidity is

A

$M{L^2}{T^{ - 2}}$

B

$M{L^{ - 1}}{T^{ - 3}}$

C

$M{L^{ - 2}}{T^{ - 2}}$

D

$M{L^{ - 1}}{T^{ - 2}}$
The dimensional formula for the modulus of rigidity is
Modulus of rigidity = $\frac{{{\rm{Shear}}\;{\rm{stress}}}}{{{\rm{Shear}}\;{\rm{strain}}}} = $ $[M{L^{ - 1}}{T^{ - 2}}]$