Question

A gauge has a resistance of $120\Omega$ & a gauge factor of 2.1 . It is shunted by a resistance of $100k\Omega$. The equivalent strain will be indicated while gauge is shunted is

• A. $570\mu$
• B. $170\mu$
• C. $470\mu$
• D. $370\mu$

Answer 1

The correct option is A $570\mu$


$\text{Given data,}{G}_f=2.1,R_g=120\Omega ,R_{shunt}=100k\Omega$

$\frac{\Delta R}{R}=G_fϵ$

$\frac{120-119.856}{120}=2.1\times \epsilon$

$\epsilon =571.43\left(\mu strain\right)$

$\epsilon \cong 570\left(\mu strain\right)$