Physics & Engineering
INTERACTIVE LABORATORY / 02

Circuit Builder

Use Ohm’s law to explain changes in current and power.

YOUR PHYSICS NOTEBOOK0 / 12missions completed on this device
Circuit workbench
SWITCH OPEN12 VEMPTY SOCKET10 Ω LAMPSERIES · THE SAME CURRENT FLOWS THROUGH BOTH COMPONENTS
Lamp current0.000 A
Supply current0.000 A
Lamp power0.00 W
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Free online interactive learning

Circuit Builder: experiment guide

This browser-based electricity lab helps you use Ohm’s law to explain changes in current and power. Designed for Grades 6–12, it turns an abstract idea into a model you can control, measure, reset, and test without signing up.

What you can investigate

Explore Voltage, resistance, current, power by changing the available controls and comparing the model’s visual and numerical evidence. Try one variable at a time, then combine changes to test a stronger explanation.

Voltageresistancecurrentpower

How to use this simulation

  1. 1Read the mission and make a prediction before moving a control.
  2. 2Change one variable so its effect is easier to identify.
  3. 3Run the model and record a value, pattern, or visible change.
  4. 4Reset, test a different setup, and explain the result from evidence.

For students, teachers, and independent study

A typical investigation takes 5–10 min. Use it as a lesson demonstration, a guided inquiry activity, a homework experiment, or a quick review. The simulation runs in a modern web browser and does not require an account.

Level
Beginner
Time
5–10 min
Format
Electricity lab

Common questions

What does the Circuit Builder teach?

Use Ohm’s law to explain changes in current and power. The main ideas are Voltage, resistance, current, power.

Is the Circuit Builder free to use?

Yes. You can run the simulation online for free without creating an account.

How long does the activity take?

Most learners can complete one investigation in 5–10 min. You can repeat it to compare more variables or improve your explanation.