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Author Topic: Easy schematic - calculating voltage  (Read 1003 times)

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Offline nForceTopic starter

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Easy schematic - calculating voltage
« on: November 15, 2018, 05:41:07 pm »
How to calculate voltage in the node point (blue)?

If the resistors had all equal value then it would be just the average voltage of all voltage sources.

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Offline mvs

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Re: Easy schematic - calculating voltage
« Reply #1 on: November 15, 2018, 06:32:00 pm »
Quote from: nForce on November 15, 2018, 05:41:07 pm
How to calculate voltage in the node point (blue)?
Kirchhoff's current law:
I1+I2+I3=0

Ohm's law:
I1=(U1-U)/R1
I2=(U2-U)/R2
I3=(U3-U)/R3

Calculation:
(U1-U)/R1+(U2-U)/R2+(U3-U)/R3=0

(-1.5-U)/100+(0-U)/150+(5-U)/200=0   | x600
(-9-6U)+(-4U)+(15-3U)=0
-13U+6=0
U=6/13=0.4615 V

« Last Edit: November 15, 2018, 06:35:19 pm by mvs »
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