Power Dissipation Calculator
Description
This MicroSim lets students explore all three forms of the power equation simultaneously. Adjust voltage, current, or resistance with sliders and observe how power changes in real time. Color-coded panels show which formula is being used and whether each quantity is set or derived.
Key Concepts
- Power is the rate of energy transfer: \(P = \frac{dW}{dt}\).
- Three equivalent forms: \(P = VI\), \(P = I^2 R\), \(P = \frac{V^2}{R}\).
- Resistors dissipate power as heat; the watt (W) is the SI unit.
- Ohm's Law links V, I, and R so any two quantities determine the third — and thus the power.
- Practical resistors have a power rating that must not be exceeded.