Current is not used up
The mistake
Assuming less current remains after each resistor in a series loop.
Why it feels right
Resistors 'use energy,' so they seem to consume current.
How to catch it
You draw shrinking current arrows around a one-loop series circuit.
The first principle
Charge is conserved. In a single series path, the same current passes through every element; resistors reduce electric potential energy per charge, not the amount of charge per second.
worked mini-example
Two bulbs are in series. Is current smaller after the first bulb?
Common wrong move
Yes, the first bulb uses some current.
Correct
No, the same current flows through both bulbs.
Test the repair CIR-05 · transfer
Make a fresh prediction before referring to the worked example.