This is an interactive sim. It changes as you play with it.

Build circuits with batteries, resistors, ideal and non-Ohmic light bulbs, fuses, and switches. Determine if everyday objects are conductors or insulators, and take measurements with an ammeter and voltmeter.

Explore and experiment with interactive circuit simulations to learn about batteries, resistors, light bulbs, switches, and electrical concepts like Ohm's law.

‪Circuit Construction Kit: AC‬

Build and explore electrical circuits with this interactive simulation, learning about voltage, current, resistance, and more in an engaging way.

Build circuits with AC voltage sources, batteries, resistors, capacitors, inductors, fuses, and switches. Take measurements with a lifelike ammeter and voltmeter and graph the current and voltage as a …

Choose learning goals that include specific, measurable, outcomes – e.g., students will be able to identify the variables that affect the strength of gravity, students will be able to describe how …

Description Walks students through the construction of series and parallel circuits using the simulators and asks them to record any observations. Gold star activities meet rigorous standards for inquiry. …

Founded in 2002 by Nobel Laureate Carl Wieman, the PhET Interactive Simulations project at the University of Colorado Boulder creates free interactive math and science simulations. PhET sims are …

See how the equation form of Ohm's law relates to a simple circuit. Adjust the voltage and resistance, and see the current change according to Ohm's law.