Physics · Electricity

Ohm's Law

Change the voltage and resistance. See how the current changes.

See what happens

Circuit

Faster particle movement shows a higher current.

Formula V = IR
Calculation I = 4.5 V / 500 Ω = 9.0 mA

Explore

Controls

V
4.5 V
Maximum 9.0 V Minimum 0.1 V
R
500 Ω
Maximum 1000 Ω Minimum 10 Ω

With resistance unchanged, more voltage gives more current. With voltage unchanged, more resistance gives less current.

In this model, more bands show greater resistance.

Simulation tools

Keyboard help

Close this window, then use ↑ ↓ to change the voltage and ← → to change the resistance.

Increase or decrease Voltage by 0.1 V.

Increase or decrease Resistance by 10 Ω.

Change the value you adjusted last by 10 steps.

Move the value you adjusted last to its lowest or highest setting.

Move to the next or previous control.

Press a button after moving to it with Tab.

Close a menu or window, or leave full-screen mode.

Pandai Simulation

Ohm's Law

Version 0.5.3

See how voltage and resistance affect current in a simple circuit.

Created by Pandai to help students learn about electricity.

Battery voltage is 4.5 volts. Resistance is 500 ohms. This is medium resistance in this simulation. Current is 9.0 milliamperes. Particles are moving at a medium speed.