1) A Wheatstone bridge has a strain gage in the lower right leg with a 100 ohm nominal resistance. It is mounted on steel with a Modulus of Elasticity (E) equal to 30x106 lb/in2. The other resistors are equal to 100 ohms. The bridge voltage is 5 V. a) What is the bridge output in V per 1250 lb/in2 of stress? Assume the Gage Factor = 2.0. b) What is the loading error produced by measuring the output with a voltmeter having an input impedance of 70 KΩ. c) If the bridge and the strain gage is used to measure the strain on a steel structure with a strain of 700 microstrain (u strain), what will be the bridge output in Volts?

1) A Wheatstone bridge has a strain gage in the lower right leg with a 100 ohm nominal resistance. It is mounted on steel with a Modulus of Elasticity (E) equal to 30x10⁶ lb/in². The other resistors are equal to 100 ohms. The bridge voltage is 5 V.

a) What is the bridge output in V per 1250 lb/in² of stress? Assume the Gage Factor = 2.0.

b) What is the loading error produced by measuring the output with a voltmeter having an input impedance of 70 KΩ.

c) If the bridge and the strain gage is used to measure the strain on a steel structure with a strain of 700 microstrain (u strain), what will be the bridge output in Volts?