Network Analysis

Tutorial on Basic Elements and Circuit Laws - Part 3

The formal solution for this problem looks like this:

Let's solve KVL around the red loop, the one consisting of the 25 W resistor, the 125 V battery, and the 75 V battery:
-V₂₅ - 125 + 75 = 0
V₂₅ = 75 - 125 = -50
I = V/R = -50/25 = -2A

Here's a new problem.

Find the voltage V.

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