Physics — Series vs Parallel Circuits

digraph Circuits {
  node [shape=box, style=rounded];
  "Series circuit" -> "Same current everywhere";
  "Series circuit" -> "Voltages add up";
  "Series circuit" -> "R_total = R1 + R2";
  "Parallel circuit" -> "Same voltage across each";
  "Parallel circuit" -> "Currents add up";
  "Parallel circuit" -> "1/R = 1/R1 + 1/R2";
}