A potential divider is made up of two resistors with resistances $R_1$ and $R_2$ joined in series across a source of potential difference $V_{in}$. The p.d. across $R_1$ is $V_{out}$. What alterations to $R_1$ and to $R_2$ would make $V_{out}$ larger?
- A$R_1$ doubled, $R_2$ doubled
- B$R_1$ doubled, $R_2$ halved
- C$R_1$ halved, $R_2$ doubled
- D$R_1$ halved, $R_2$ halved