Download Magnetism from Electricity

Magnetism from electricity
Magnetism from electricity
• In 1820, Danish scientist
Han Christian Oersted
discovered accidently
that when electricity
passed through a
wire…a magnetic field
was created
Which way would the compass
needles point if we placed them
around the wire?
Without a current….with a current
A magnetic field is induced by the current
Electromagnet
• A current carrying coil of wire with many loops
is called an electromagnet
Superconducting
electromagnets
The most ignominious
military use of
superconductors may come
with the deployment of "Ebombs". These are devices
that make use of strong,
superconductor-derived
magnetic fields to create a
fast, high-intensity electromagnetic pulse (EMP) to
disable an enemy's electronic
equipment. Such a device
saw its first use in wartime in
March 2003 when US
Forces attacked an Iraqi
broadcast facility.
Lab-Make an electromagnet
• http://www.magnet.fsu.edu/education/tutori
als/slideshows/electromagnet/index.html
• file:///J:/ConceptualPhysicsWorksheets/Lab%
20%20Making%20an%20Electromagnet%20Activ
ity.htm
Magnetism and Electricity are related
Magnetism from Electricity
• A moving charge (electron)
a magnetic field
• Many moving charges (an
electric current) produce a
magnetic field
Electricity from Magnetism