Learn anything you ever wanted to know and more about electrical circuits here. Complete with in-depth explanations and detailed diagrams.

Build an intuitive understanding of current and voltage, and power.

Four complete lessons on current electricity in the study of physics. Lessons include informational text, interactive activities, animations, and quick, interactive comprehension checks.

Circuit analysis is the process of finding all the currents and voltages in a network of connected components. We look at the basic elements used to build circuits, and find out what happens when elements are connected together into a...

Try these SPARKS troubleshooting breadboard circuit challenges.

See how a breadboard electrical circuit works.

When measuring the current in parallel circuits, compare the circuit's total current with the current through just one resistor.

Use Ohm's Law to calculate the current in parallel circuits.

Use resistance formulas to determine the total resistances of the series and parallel parts. Then, use Ohm's Law to calculate the voltage drops across and currents through each part.

Measuring voltage drops across resistances in series-parallel circuits requires an understanding of both series and parallel circuit behavior. Learn more with this tutorial.

Find out how the SPARKS DMM can measure AC voltage and current.

See how Ohm's Law can tell us that the voltage across resistors will depend on that current value I and each R-value.

Measuring the voltage in a circuit is like measuring the drop in pressure across two points. Learn more with this tutorial.

Find out how measuring current in a circuit is like measuring the flow rate of water in a sprinkler system.

We solve a circuit by direct application of the fundamental laws: Apply element laws (Ohm's Law and the like) plus Kirchhoff's Laws to solve for the currents and voltages of a circuit.

Find out how the current in a circuit can be impeded by three types of circuit components.

The voltage in AC circuits oscillates at a rate known as the frequency. With an oscilloscope, see and measure the length of time between signals, and calculate the frequency of an AC signal.

This tutorial illustrates why adding bulbs to a circuit makes all the bulbs dimmer.

This digital textbook covers core physics concepts and includes interactive features, real world examples, videos, and study guides.

Use the series and parallel resistance formulas to determine the total resistances of the parts. Then, use Ohm's Law to calculate the voltage drops across each part.

Find out how measuring voltage in a circuit is like measuring the pressure in a water pipe.

Use the tutorial to find the total resistance for resistors in a series circuit.

This customizable digital textbook covers topics related to fourth-grade science. It is Next Generation Science Standards (NGSS) aligned.