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Magnetic fields
Hall voltage
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When a
current
flows at
90°
through a magnetic field, there will be a
magnetic force
on the
electrons
flowing through the
wire
, forcing them to one
surface
of the
conductor.
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The direction of the force will be given by Fleming’s
left-hand
rule.
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The
build-up of
electrons on one surface
will cause it to become
negative
and the other surface
positive.
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This creates an
electric field
between the
surfaces
and causes an
electric force
on the
electrons
in the
opposite direction.
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In the
end
, the
magnetic
force and the
electric
force will balance
, and an
equilibrium
is reached.
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The
potential difference
between the surfaces, measured with a
voltmeter
, when this
equilibrium
is reached, is denoted as
VH.
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