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I'm trying to get UR5 from this schema, but something is not right.

All I have so farSchema data

data

calculation

calculation

I'm looking for this value

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2 Answers 2

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I have a weakness that I need to redraw the circuit in a way that is easier to understand:

schematic

simulate this circuit – Schematic created using CircuitLab

R216 = R2+R1+R6 = 130 ohm

R21635 = R216 || R3 || R5 = 15.15 ohm

And the resistance of all the resistors combined is

R216354 = R21635 + R4 = 75.15 ohm

The current through all the resistors combined is

I = E1 / R216354 = 20 / 75.15 = 0.266 A

Since all of the current goes through R4, we can find U4

UR4 = I*R4 = 0.266 * 60 = 16.0 volts

Then

UR5 = E1 - UR4 = 4 volts.

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  • \$\begingroup\$ Thank you for your answer. \$\endgroup\$
    – SpitFire
    Commented Mar 28, 2022 at 18:07
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There is an arithmetic problem: -

enter image description here

I'm trying to get UR5 from this schema

So (R1+R2+R6) || R3 || R5 = 15.14563 Ω and not 15 Ω.

Then it's just a simple potential divider with the 15.14563 Ω and R4.

Hence, UR5 = 4.031 volts

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  • \$\begingroup\$ thank you for your feedback \$\endgroup\$
    – SpitFire
    Commented Mar 28, 2022 at 18:10

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