Battery Language
Cells, torches and circuit symbols
What this lesson covers
Why it matters
Inside a torch: two cells stacked nose-to-tail, a spring, a strip of metal and a bulb. Engineers can draw that whole torch in five little symbols — a secret alphabet worth learning.
Predict first
A 'battery' is…
One unit = a cell. Team them up (+ to −, nose to tail) and the team is a battery — more push for brighter bulbs.
- two or more cells joined together — correct
- the same thing as one cell
- a kind of bulb
What you do
Learn the five-symbol alphabet every circuit is written in.
Check yourself
In a torch, cells must be placed…
Backwards cells cancel each other's push — the torch stays dark. (Everyone learns this the hard way.)
A dry cell converts…
A tiny chemistry lab in a can — the reaction pays for every glow.
A RESISTOR is a component that…
It''s the circuit''s speed-bump — useful wherever you want less current, and it has its own symbol (the zigzag/box).
- + of one touching − of the next — correct
- + touching +
- any way — they figure it out
- chemical energy into electrical energy — correct
- electrical into chemical
- light into electricity
- opposes the flow of current — correct
- stores electricity for later
- makes the current flow faster