there is a black box with 4 terminals; A, B, C, D. the measurements are shown be

Question

there is a black box with 4 terminals; A, B, C, D. the measurements are shown below. all resistors have a 10% precision. The students performing the lab are trying to decide between the following 2 circuits. Which circuit do you choose and why?

(the ammeter must always be in series with the power supply. There are at least 4 resistors: 10k, 15k, 20k, 22k, 33k, 47k, and 100k.)

Measurements value
V (in-out)               10V
i with V (in-out)=10V        0.16mA
V (in-A)                               1.2V
V (A-B)                                1.8V
V (B-out)                             7V

Circuit 1 on top

Circuit 2 on bottom

Black Box

Explanation / Answer

Circuit 1 is giving more nearest values for our desired values.
Effective resistance in the first circuit is 65.57.

for this circuit we are getting the following values

i with V (in-out)=10V        0.1525mA
V (in-A)                               1.5V
V (A-B)                                1.3V
V (B-out)                             7.16V

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