A circuit diagram lies about distance — and that's the point
Students try to read circuit diagrams like maps, worrying about which component is closer or which wire is longer. A schematic throws all of that away on purpose, and understanding why makes circuits click.
A student once asked me, completely seriously, whether a bulb drawn closer to the battery would be brighter than one drawn further away. It's a brilliant question, because it reveals exactly how they're reading the diagram — as a picture of where things are. It isn't. A circuit diagram throws away distance, size, and shape on purpose, and once you know what it keeps instead, circuits get dramatically easier.
A schematic records connection, not position
The only thing a circuit diagram cares about is what is connected to what. Where you draw a component on the page, how long you make the wires, whether the resistor sits left or right — none of it carries meaning. You could slide every component around like fridge magnets and, as long as the connections stay the same, it's the identical circuit.
This is liberating once you accept it. The wire is treated as perfect — no resistance, no length, no "distance for the current to get tired over." So the bulb near the battery and the bulb far from it behave identically, because in the diagram they're the same distance from everything: zero.
What you should actually be reading
Stop looking at the layout and start tracing the topology — series or parallel:
- In series, there's one single loop. The same current must pass through every component, because there's nowhere else for it to go. Add a bulb and they all dim.
- In parallel, the path splits. Each branch gets the full battery voltage, and the current divides between them. Remove one branch and the others don't care.
The single most useful skill in circuits is looking at a tangle of lines and asking only: does the current have one path, or does it split? Answer that and most questions fall open.
Don't read a circuit diagram like a map of a town. Read it like a list of handshakes — who is touching whom. The geography is fiction; the connections are everything.
It's the same lesson as a free-body diagram: the drawing isn't a photograph of reality, it's a tool that keeps the one thing that matters and deliberately bins the rest. Trust what it keeps.