Asingle strain gage has a nominal resistance of 120 ohm. for a quarter bridge with 120 ohm fixed resistors, strain gauge factor is 2.01 with a strain of 1000-μstrain for a supply voltage of 3v. compute the voltage output as mv?

Output voltage is 1.507 mV

Solution:

As per the question:

Nominal resistance, R =

Fixed resistance, R =

Gauge Factor, G.F = 2.01

Supply Voltage,

Strain,

Now,

To calculate the output voltage, :

WE know that strain is given by:

Thus

Now, substituting the suitable values in the above eqn:

their crystal patterns have been disrupted by stress