Electromagnetism Flashcards
is a process where a
magnetic field is created by
introducing a current into the
conductor or by producing electricity
with changing magnetic field.
Electromagnetism
branch of
Physics that deals with the
electromagnetic force that occurs
between electrically charged particles.
Electromagnetism
is a type of physical interaction
that occurs between electrically charged particles.
Electromagnetic force (EMF)
is the
combination of all magnetic and electrical forces.
Electromagnetic force (EMF)
Any charge in motion induces a
Magnetic field
____ creates a magnetic field
Electrons flowing in a wire
The electromagnetic force can be(2)
attractive or
repulsive.
More loops makes the magnetic field?
Stronger
The magnetic field can be
____ by wrapping the coil
of wire around ferromagnetic
material (iron).
.intensified
Can travel through anything
EM waves
EM are classified according to their (2)
frequency and
wavelength
The magnetic field is represented by the
imaginary lines that form ____centered on the wire.
concentric
circles
All the magnetic field lines come
together at the___ of the loop
making the magnetic field strong
center
A coil of wire is called a
solenoid
discovered that electric currents create magnetic fields
Hans Christian Ørsted(Danish
physicist and chemist)
•This was the first connection
found between electricity and
magnetism.
electromagnetic induction
formulated two laws on the bases of his experiments
Michael Faraday (1831)
First Law: “Whenever a conductor are
placed in a______, an
electromotive force (emf) is induced.
varying magnetic field
First law: If the conductor circuit is closed, a current is induced which is called ?
induced current.
Faraday concluded that an electric current cannot be induced in a circuit merely by presence of magnetic field. It should be a ?
changing magnetic field
Second Law: “The magnitude of
the induced emf in a coil is equal
to the ______that
linkages with the coil.”
rate of change of flux
The____ is the product of
the number of turns in the coil
and the flux associated with the
coil.
flux linkage
proposed a theory of electromagnetic field which has something to do with the space in the
neighborhood of the electric or magnetic bodies
James Clerk Maxwell
• It assumes matter in motion, by which the observed
electromagnetic phenomena are produced
• Electromagnetic field is that part of space which contains
and surrounds bodies in electric or magnetic conditions
James Clerk Maxwell theory of electromagnetic field
