September/October 2018 61
However, the right amount of charge restriction causes
energy to be used in the device. The device can glow or
heat or move or make sounds or many other things. Power
is being used by such devices.
If a device is to use power, it must pass some charges
but not freely. If no charges pass — no matter how high the
voltage — then no power is used. If charges pass through
with no restriction, again, no power is used. Only by
partially restricting charge flow can we use power from a
Charge flow restriction (resistance) is a characteristic of
the light bulb allowing it to generate power from electricity
where wires and switches and the surrounding air remain
inactive. If we can learn how to use wires and switches and
other devices, we can begin to make electricity do what
we want. NV
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NEXT POSER: Pushing charges around.
Here, the bulb is on, yet the wires to the light remain dark
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