Brainlag PlusOne loop: the same current everywhere, the supply p.d. shared out, and resistances that add.
The three series rules
In a series circuit everything is in one loop.
- Current: the same at every point. The ammeter would read the same anywhere in the loop.
- Potential difference: the supply p.d. is shared between the components: V₁ + V₂ = supply p.d.
- Resistance: the total is the sum.
total resistance = R₁ + R₂ + ...
Rtotal = R₁ + R₂
This one is not given on any sheet: learn it.
The rest of this lesson and its 7 practice questions are in Plus.
Screen 1 of 3, free to read.
- 7 exam-style questions, marked as you go, each with a worked solution
- The Series and parallel circuits simulation beside every question
- Anything you get wrong is saved to your flashcards