--) The ignition-spark system for a car has an important capacitor in it.
Oh? It had one in the old days which was a spark suppressor, used
solely to extend the life of the breaker points by preventing a
high current spark when the current through an inductor (the spark
coil primary) was interrupted. That capacitor was usually called a
"condenser", by the way. In a modern* electronic ignition system
the breaker points operate at low voltage and the switching is
done by a solid state device. The lifetime of the points exceeds
that of most automobiles, and a condenser is not needed.
Leigh
* Few if any of our students are old enough to remember any other
kind of ignition system, and a fraction now approaching 0% work on
their engines.