
#1
Mar1511, 01:53 PM

P: 75

1. The problem statement, all variables and given/known data
1. Why is the Wheatstone bridge measurement capable of so much greater accuracy than the measurement or resistance with voltmeters and ammeters, using R = V/I? and 2. R in this experiment is a resistance box and so is accurate to the nearest ohm. Is this uncertainty in R more or less important than the uncertainties in L1 and L2? 2. Relevant equations Attached doc for procedure 3. The attempt at a solution I'm not sure about these two questions for my postlab. For 1, I thought that the Wheatstone bridge would be more accurate because it's independent of the supply voltages, other than from thermal inaccuracies. But I don't know why beyond that maybe that's all the question is getting at? Not sure. And for 2, I really don't know. Both are in the equation? So why would one be 'more important' than the other, anyway? Thanks for any insight 


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