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  4. The dimensional formula for Youngs modulus is:

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Q. The dimensional formula for Youngs modulus is:

Uttarkhand PMTUttarkhand PMT 2006

Solution:

The formula for the Youngs modulus
$Y=\frac{\text { stress }}{\text { strain }}$
Dimensions of $Y=\frac{\left[M L^{-1} T^{-2}\right]}{\left[M^{0} L^{0} T^{0}\right]}$
$=\left[M L^{-1} T^{-2}\right]$