13.2 Lenz’s Law Flashcards
Lenz’s law
if a changing magnetic field induces a current in a coil, the electric current is in such a direction that its own magnetic field opposes the change that
produced it
electric current can create a …
magnetic field
Since Oersted had proven that a steady
current would produce a magnetic field,
scientists of the time thought it would
only be logical if a ____ ________ _______ produced a current.
steady magnetic
field
It was Faraday who discovered that it
takes a ________ magnetic field to
induce a current in a wire.
changing
law of electromagnetic induction
An electric current is created in a
conductor when the magnetic field near
the conductor changes.
A ______ wire will have more induced
current that a _______ wire
coiled; straight
The more _______ the coil has, the more
electric current can be induced
loops
The higher the ______ __ _______of the
magnetic field, the more current is
produced
rate of change
The _________ the magnetic field, the
greater the current produced
stronger
Lenz’s Law 🡪
The magnetic field of the created current always works against the change in magnetic field that is causing the created current.
When the north pole moves TOWARD the Helix,
the current is created so that it can make a
second North pole to ______ the magnet.
repel
When the North pole is moved back OUT of the
helix, the current will change so that there is a
south pole near the magnet to ________ it.
attract
