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The right-hand rule is a simple mnemonic tool used to determine the direction
of the magnetic field created by an electric current. This rule is widely used in
electromagnetism and is especially useful for understanding the interaction between
electric currents and magnetic fields.
To use the right-hand rule, simply extend your right hand with your thumb, fingers,
and palm facing the direction of the current flow. Then, curl your fingers in the
direction of the magnetic field. Your thumb will then point in the direction of
the magnetic field.
This rule is based on the observation by Scottish physicist John Ambrose
Fleming that a current flowing in a wire creates
a magnetic field that circles around the wire in a clockwise direction when viewed
from the end of the wire. The right-hand rule is a convenient way to remember this
relationship and apply it to more complex situations involving multiple wires or
other types of electrical components.
For example, consider a simple loop of wire carrying a current. According to
the right-hand rule, the magnetic field created by the current will circulate around
the wire in a clockwise direction when viewed from the end of the wire. If we then
place a bar magnet near the wire, the magnetic field created by the current will
interact with the magnetic field of the bar magnet, producing a force on the wire.
The direction of this force can be determined using the right-hand rule.
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 While working on an
update to my
RF Cafe Espresso Engineering Workbook project to add a couple calculators
about FM sidebands (available soon). The good news is that AI provided excellent
VBA code to generate a set of
Bessel function plots. The bad news is when I asked for a
table
showing at which modulation indices sidebands 0 (carrier) through 5 vanish,
none of the agents got it right. Some were really bad. The AI agents typically
explain their reason and method correctly, then go on to produces bad results.
Even after pointing out errors, subsequent results are still wrong. I do a
lot of AI work and see this often, even with subscribing to professional
versions. I ultimately generated the table myself. There is going to be a
lot of inaccurate information out there based on unverified AI queries, so
beware.
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