Question

Another student also performed the experiment described in the problem above. Unfortunately, he did not have access to the commercial strain indicator, and instead he had to construct his own Wheatstone Bridge circuit. His strain gage had an initial resistance of 120 Ohm and a gage factor of 2.05. He used the single gage as one leg of the bridge, which he powered with a 6-V battery. The bridge output was fed to an amplifier (gain = 1000), and the amp's output was read by a voltmeter. The student balanced the bridge circuit before he opened the can. After the can was opened, the voltmeter indicated a voltage of -1.57 V. What was the measured pressure for his can? Enter your answer in psi (e.g 120.1) 456 Chapter 12 Strain and Stress: Measurement and Analysis Circumferential strain gage FIGURE 12.22: Instrumented soda can.

          Another student also performed the experiment described in the problem above. Unfortunately, he did not have access to the commercial strain indicator, and instead he had to construct his own Wheatstone Bridge circuit. His strain gage had an initial resistance of 120 Ohm and a gage factor of 2.05. He used the single gage as one leg of the bridge, which he powered with a 6-V battery. The bridge output was fed to an amplifier (gain = 1000), and the amp's output was read by a voltmeter. The student balanced the bridge circuit before he opened the can. After the can was opened, the voltmeter indicated a voltage of -1.57 V. What was the measured pressure for his can? Enter your answer in psi (e.g 120.1)
456 Chapter 12 Strain and Stress: Measurement and Analysis
Circumferential
strain gage
FIGURE 12.22: Instrumented soda can.

Another student also performed the experiment described in the problem above. Unfortunately, he did not have access to the commercial strain indicator, and instead he had to construct his own Wheatstone Bridge circuit. His strain gage had an initial resistance of 120 Ohm and a gage factor of 2.05. He used the single gage as one leg of the bridge, which he powered with a 6-V battery. The bridge output was fed to an amplifier (gain = 1000), and the amp's output was read by a voltmeter. The student balanced the bridge circuit before he opened the can. After the can was opened, the voltmeter indicated a voltage of -1.57 V. What was the measured pressure for his can? Enter your answer in psi (e.g 120.1)
456 Chapter 12 Strain and Stress: Measurement and Analysis
Circumferential
strain gage
FIGURE 12.22: Instrumented soda can.

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