system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How is electricity physically measured (like at the meter on my house)?
gpt
The old dial type meters are basically induction motors. They’re motors that spin at various speeds depending on how much current is passing through the meter.  The more current (ie you’re drawing more power), the faster the motor spins.  That motor is connected to the dials via calibrated gears that run the dial.