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Unreasonable Results(a) What resistance would you put in parallel with a $40.0-\Omega$ galvanometer having a $25.0-\mu \mathrm{A}$ sensitivity to allow it to be used as an ammeter that has a full-scale deflection for $10.0-\mu \mathrm{A}$ ? (b) What is unreasonable about this result? (c) Which assumptions are responsible?

$25>10$

Physics 102 Electricity and Magnetism

Chapter 21

Circuits, Bioelectricity, and DC Instruments

Direct-Current Circuits

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So in this problem, we have ah, Gavin ometer and that we want to connected connected the internal resistance with another one so that Ah, we get another, uh, full scale. So because it isn't there is connected in peril. So we have Ah, this is the are one are two and this is the current I want and currently too and the total current I. So from the problem, we see that the regional internal resistance of the common nominator are one is 40 homes and, uh, the current flow Well, our one is maximally 25 microns Pierce and ah, if now we get our two connected with our wanting parable so we want to get I as maximum value 10 microbe appears so. But apparently this is not possible because ah, we have I equal. I won class All right too, right? If we just way simply add another resisted here. So typically the eye to here it should be positive. So if I was 25 and I turned so we cannot see any positive solution for I too, right? So that's the reason why this is this is no reasonable. If we want to make this problem reasonable. We actually need to set the total current. I is at the least, the greater than 25. My crime here's okay.

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