DC Network Theorems Unit 5 – Kirchhoff's Solution with 2 Sources
UNIT 5 – KIRCHHOFF'S SOLUTION WITH 2 SOURCES
UNIT OBJECTIVE
At the completion of this unit, you will be able to find voltage and current in circuits with two
voltage sources by using Kirchhoff's laws. You will verify your results by comparing measured
and calculated values.
UNIT FUNDAMENTALS
This circuit has two voltage sources. For each voltage source, current is assumed to flow in the
direction shown.
The application of Kirchhoff's laws to the circuit gives you the current through R3. The direction
of the current is determined by the sign (+ or -) of the current. A negative (-) sign for current
through R3 indicates an incorrect assumption about the initial current direction. The problem is
to find the voltage drops and the current flow through each resistor. You can apply Kirchhoff's
laws to determine these circuit solutions.
This is a two-source circuit (VS1 and VS2). There are 3 loops in this circuit, but only two are
required for Kirchhoff's voltage law application.