Everyday Science · 45 sec
Electric battery
The science behind something you encounter, use, or wonder about.
The useful idea
- Electrochemical cells
An electric battery is a source of electric power consisting of one or more electrochemical cells with external connections for powering electrical devices.
- The negative terminal supplies
The terminal marked negative is the source of electrons.
- Two electrodes react
When a battery is supplying power, its positive terminal is the cathode and its negative terminal is the anode.
Why this matters
Look for Electric battery the next time you notice this pattern in everyday life.
Try this
Look for Electric battery the next time you notice this pattern in everyday life.
Test your recall
Which idea belongs to the explanation of Electric battery?
- Electrochemical cells — correct
- The negative terminal supplies
- Two electrodes react
An electric battery is a source of electric power consisting of one or more electrochemical cells with external connections for powering electrical devices.