Magnetism 4 Electromagnets
Transcript Magnetism 4 Electromagnets
Electricity and Magnetism Related
Hans Christian Oersted
Discovered that an electric current causes a
Connected a series circuit
and turned on the power. A
nearby compass moved!
there was an
Discovered that a magnetic field causes
an electrical current.
Moved a wire through the
magnetic field of a strong
magnet. Found that an
electric current was produced
in the wire.
Temporary magnet made by wrapping a current
carrying wire around an iron core.
More coils = ____________
More current = ____________
Moving coil electric current detector.
The amount of deflection of a needle attached to
the coil is proportional to the current passing
through the coil.
The accuracy of moving coil meters is
Having a uniform and constant magnetic field