Ask What They Share Before You Pick a Formula

You'll learnto match every symbol in a power formula to one element, to let the wiring choose between I²R and ΔV²/R, and to multiply by a time when an energy is asked for.

A 100 watt bulb and a 60 watt bulb, wired in series — and the 60 watt one is brighter. Wire the same two in parallel and the ranking flips. Eleven short steps; press Next for each one.

11 STEPS · 6 QUICK CHECKS · MATCH THE SYMBOLS · WHAT IS SHARED · RATE VERSUS AMOUNT · v2

a shared current picks I²R · a shared voltage picks ΔV²/R

Before you start

What you're looking at

The same circuit rectangle as the earlier topics. Elements on the top wire are in series and share a current; elements on vertical branches share a voltage.

The question

Given two elements in a circuit, which one dissipates more power?

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