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🔌 How Do Series and Parallel Resistors Work?

Trace current and voltage through series and parallel resistor networks, reduce mixed circuits, and check your result with power.

lessons

~10 min

to learn

🔬 Science

subject

Adults

level

Start the course →

What you’ll learn

TopologyClassify series and parallel resistor connections from their paths and nodes.Follow current paths and junctions to determine what shares current, voltage, or neither.
AnalysisReduce and check simple mixed resistor networks.Replace recognizable groups, work backward for branch values, and test the result with power.

Questions this course answers

What do series resistors share?

One uninterrupted path carries the same current.

What do parallel resistors share?

Both terminals connect to the same two nodes.

Where is parallel Req?

The reciprocal sum makes the equivalent smaller than every branch resistance.

What checks a network solution?

In an ideal circuit, source power equals total resistor power.

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