Part A
For the circuit shown in (Figure 1), if $\Delta R \ll R$, the output voltage of the op
amp is approximately
$v_o \approx \frac{R_f (R + R_f)}{R^2 + 2 R R_f} (-\Delta R) v_{in}$
Find $v_o$ using the approximate expression given if $R_f = 500 \text{ k}\Omega$, $R = 15 \text{ k}\Omega$, $\Delta R = 100 \Omega$, and $v_{in} = 15 \text{ V}$.
Express your answer to four significant figures and include the appropriate units.
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Figure
$R_f$
$R + \Delta R$
$R$
$R$
$R$
$v_{in}$
$R$
$R$
$R_f$
$v_o$
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Part B
Find the actual value of $v_o$ for the conditions from part A.
Express your answer to four significant figures and include the appropriate units.
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