Consider the constant-voltage bridge shown in Figure 4.31a.
Suppose that the bridge is balanced with the resistors set according to
![438_b516a6bd-8e7e-4e3e-91b4-4053a2c5d7b9.png](https://secure.tutorsglobe.com/CMSImages/438_b516a6bd-8e7e-4e3e-91b4-4053a2c5d7b9.png)
Now, if the active element R1 increases by δR1, what is the resulting output of the bridge?
For what value of the resistance ratio p, would the bridge sensitivity be a maximum? Show that this ratio is almost equal to 1.