9702 · 10.3
Potential dividers
Cambridge 9702 Paper 2 — Potential dividers (10.3). Senpai Corner diagram-backed pilot with premium structure and live visuals.
Need to know
What you need to know
- 10.3 Potential dividers.
- According to Kirchhoff’s Second Law, the potential difference across a power source is divided when two resistors are connected in series.
- The larger the resistance the larger the voltage share (the big eater gets more pie!).
- A potentiometer is a type of variable resistor used as a potential divider.
- In the diagram above, the total resistance of the potentiometer is R.
- When the slider is moved it divides R into R1 and R2.
Explanation
Potential dividers
- 10.3 Potential dividers.
- According to Kirchhoff’s Second Law, the potential difference across a power source is divided when two resistors are connected in series.
- The larger the resistance the larger the voltage share (the big eater gets more pie!).
- A potentiometer is a type of variable resistor used as a potential divider.