Experiment 6 - Comparison Capacitor - Battery
In the last experiments,
a comparison between a capacitor and a battery was drawn several times.
Both store electric energy.
What is the difference of their capacity?
You learn this here.
A standard 9V battery stores 500 mAh.
It is able to...
supply 500 mA for one hour.
(A torch with a 4.5 W light bulb lights up 3600 seconds long.)
A 100 μF
electrolytic capacitor charged with 9 V is able to...
supply 0.9 mA for one second.
(A torch with a 4.5 W light bulb lights up 0.0018 seconds long.)
Therefore, to replace the 9 V battery,
you need a capacitor with 200 farad...or...2 million
100 μF capacitors!
A 9V battery (left) and an electrolytic capacitor (right).
Symbol 9 V battery.
Symbol electrolytic capacitor.
Batteries can therefore not be readily replaced by capacitors.
But how to combine two million capacitors?
This you see in the next experiment.