- Slides: 9
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: /Conceptual. Physics. Worksheets/Lab% 20%20 Making%20 an%20 Electromagnet%20 Activ 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