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?

For wheatstone bridge,normal resistance of wheatstone bridge is 100 ohmModulus of Elasticity (E) equal to 30x106 lb/in2.bridge voltage is 5 V.other resistance is 100ohma) Vo=0.000104145Vb) Loading error is 0.145µVc) Vo=1.748mV

Answered: 1) A Wheatstone bridge has a strain…

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

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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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