What Arrives Must Leave

You'll learnwhat the junction rule actually settles, where the branch shares really come from, and why a burned-out bulb makes one survivor brighter and another dimmer.

Six amperes reach a fork and split between two branches. The rule that whatever arrives must leave is exact — and it does not say three and three. Twelve short steps; press Next for each one.

12 STEPS · 6 QUICK CHECKS · THE TOTAL AND THE SHARES · SOLVE IT TWICE · v2

the rule fixes the total · the resistances fix the shares

Before you start

What you're looking at

A circuit where six amperes reach a junction and split two ways, and later three identical bulbs, one in series with a parallel pair.

The question

When current reaches a fork, what decides how much goes each way?

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