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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?

Power System Analysis and Design (MindTap Course List)
Power System Analysis and Design (MindTap Course List)
6th Edition
ISBN:9781305632134
Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Chapter3: Power Transformers
Section: Chapter Questions
Problem 3.30P: Reconsider Problem 3.29. If Va,VbandVc are a negative-sequence set, how would the voltage and...
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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?

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