Q1a - BIEN 130 Bioinstrumentation Q1 April 8, 2009 Name: _...

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BIEN 130 Bioinstrumentation Q1 April 8, 2009 Name: _____________________________________ Score: ________/3.0
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1. MacGyver needs to use a defibrillator, but the charging mechanism on the unit is broken. He uses part of a digital scale to fix the problem, connecting the Wheatstone bridge in the scale to the defibrillator circuit as diagrammed below. a. The markings on the resistors in the Wheatstone bridge are a little unclear, but MacGyver can tell that 1 100 R and 3 50 R . With no weight on the scale, the resistance of the strain gauge is 25 x R . What is the value of 3 R , assuming the bridge is balanced when there is no weight on the scale?
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Q1a - BIEN 130 Bioinstrumentation Q1 April 8, 2009 Name: _...

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