ELECTRICITY IN MOTION You're pretty familiar with what electricity can do. You flip a
switch and a light bulb glows. You push a button and a fan whirs to
life. Tuming on an electric oven makes it heat up. But why do you
get these results? What do a glowing light bulb, a spinning fan, and
a hot oven have in common?
The answer is current electricity, or the steady flow of bits of
matter called electrons. You can't see electrons. They're so small
that even the best microscopes won't show one to you. But while
electrons aren't visible, you can see the effects of their motion.
Light bulbs, fans, ovens—all of these work because you've let the
electrons flow