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Topic keyPHY -> Circuits -> Parallel Networks -> PHY_EL_RC_001
ScenarioEquivalent circuit walkthrough
Saved sessions0
CURRENT OUTPUT

Equivalent circuit walkthrough

A 12V source powers R3 = 4 ohm in series with a branch containing R1 = 6 ohm and R2 = 3 ohm in parallel. Find the equivalent resistance and total current.

Series + parallelEquivalent resistanceCurrent
DomainPhysics
GoalUnderstand the method
Generated3/30/2026, 12:56:26 PM
12VR3=4AR1=6R2=3B
FOCUS STEP

Draw the original network

Start with the untouched circuit so the student knows exactly which two resistors share the same pair of nodes.

Known values: R1 = 6 ohm, R2 = 3 ohm, R3 = 4 ohm, V = 12V
R1 and R2 are in parallel because both ends connect to the same two nodes.