Voltage divider

Hi, May i know what is formula to calculate the voltage divider for this circuit ?

by ashrof
January 13, 2023

It is NOT a voltage divider. To be a voltage divider, the same current should flow through the two resistors. Here, some current from R1 is allowed to escape toward R5.

The equations can be:

Loop through V1:
3 = iR1 R1 + iR3R3

Loop through V2:

1 = iR4 R4 + iR5R5

Loop through R2, cable without resistor, R5, ground:

0 = -iR2R2 + iR5 R5

(The - sign is needed since we travel the loop backward across R3)

And the fourth equation is supplied by the sum of current at the nodes with the wire without resistor:

iR1 - iR3 = iwire = iR5 - iR4

Solve 4 equations with 4 unknowns.

iwire has to be zero for the voltage divider formula to be applicable. (or close to 0 to get an good approximation, as when it is 10 000 less than iR1).

by vanderghast
January 13, 2023

Thanks

by ashrof
January 13, 2023
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