Choose a generation method, follow electricity through the National Grid, and click each tile to see how voltage changes from stage to stage.
The National Grid can be supplied by different energy resources. Each has a different energy transfer pathway plus advantages and disadvantages.
Click or tap a tile. The key idea is that voltage is stepped up for transmission, then stepped down before homes.
For a fixed power demand, increasing voltage reduces current because P = IV. Lower current means less heating in the transmission cables because P lost = I²R.