A potential divider circuit is made by placing a battery with negligible internal resistance in series with two variable resistors, as illustrated. The variable resistors have resistances $R_x$ and $R_y$. $V_x$ is the potential difference (p.d.) across the variable resistor whose resistance is $R_x$. $R_x$ and $R_y$ are both altered at the same time. Which combination of changes must lead to $V_x$ increasing?
Physics 9702 · AS & A Level · Potential dividers