b) A test specimen is installed with one of its end screwed to a vertical plate as shown in Figure Q3 (b). A pair of strain gauges connected to a bridge circuit is used to measure the change in length when a downforce F is applied to the free end of the test specimen. The original resistance of the gauges, Rg is 350 2 and both have a gauge factor of 2.2. Gauge in Ro* AR tension R (Ro AR) ,(compression) VEX Vo Gauge in compression (R-AR) Ra-AR (tension) Figure Q3 (b) (i) Determine the change in resistance of the strain gauge if the strain value, o is given as 250 x 106 . (ii) If the ratio between the change in resistance and change in length is given as 0.025 2/mm, determine the length of the test specimen deflection. (iii) Derive the equation for the Wheatstone bridge shown in Figure Q3 (b). If the source voltage, VEx = 12 V, calculate the expected value of Vo. Assume R1 = R2 %3D = RG- 12

b) A test specimen is installed with one of its end screwed to a vertical plate as shown in Figure Q3 (b). A pair of strain gauges connected to a bridge circuit is used to measure the change in length when a downforce F is applied to the free end of the test specimen. The original resistance of the gauges, Rg is 350 2 and both have a gauge factor of 2.2. Gauge in Ro* AR tension R (Ro AR) ,(compression) VEX Vo Gauge in compression (R-AR) Ra-AR (tension) Figure Q3 (b) (i) Determine the change in resistance of the strain gauge if the strain value, o is given as 250 x 106 . (ii) If the ratio between the change in resistance and change in length is given as 0.025 2/mm, determine the length of the test specimen deflection. (iii) Derive the equation for the Wheatstone bridge shown in Figure Q3 (b). If the source voltage, VEx = 12 V, calculate the expected value of Vo. Assume R1 = R2 %3D = RG- 12

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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