Engineering Theory & Mathematical Model
Georg Simon Ohm established that the steady electric current I flowing through an ohmic conductor is directly proportional to the potential difference V across its terminals and inversely proportional to its resistance R. Notice how the Ammeter (1 mΩ internal shunt) is wired strictly in series so all 100 mA pass through it, whereas the Voltmeter (1 GΩ input impedance) is wired in parallel across the load.
Interactive Lab Procedure
- Toggle switch S1 open and closed to see current drop immediately to 0.00 A while source voltage stays at 12V.
- Click the 120 Ω resistor and sweep its resistance from 60 Ω (200 mA) to 240 Ω (50 mA) while watching current particle speed change.
- Hover over the resistor to read instantaneous power dissipation P = 1.20 W.
Technical FAQ
What is the core governing formula for Ohm's Law Virtual Circuit Lab (V = I × R)?
I = V / R, P = V × I = I²R = V² / R — Georg Simon Ohm established that the steady electric current I flowing through an ohmic conductor is directly proportional to the potential difference V across its terminals and inversely proportional to its resistance R. Notice how the Ammeter (1 mΩ internal shunt) is wired strictly in series so all 100 mA pass through it, whereas the Voltmeter (1 GΩ input impedance) is wired in parallel across the load.
Can I modify component values and rewire this circuit live?
Yes! The schematic above runs a live MNA SPICE engine. Click any part to adjust parameters, add or delete wires and components, and click Share URL to save your custom topology.