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Resistance
is
the
measurement
of
the
ability
of
electrons
to
move
through
a
material.
A
copper
wire
with
a
large
diameter
has
lower
resistance
to
the
flow
of
electrons
than
a
copper
wire
with
a
small
diameter.
You
need
to
understand
resistance
because
almost
every
electronics
project
you
do
involves
a
resistor.
Resistors
have
controlled
amounts
of
resistance,
which
allows
you
to
control
the
flow
of
electrons
in
a
circuit.
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