What
makes
the
electric charge
to flow? Let us consider the analogy of flow of water.
t
t
Charges
do not flow
copper | ||
themselves | ||
difference |
Default
in a copper wire by themselves, just as water in a perfectly horizontal tube does not flow. If one end of the tube is connected to a tank of water kept at a higher level, such that there is a pressure difference between the two ends of the tube, water flows out of the other end of the tube.
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