Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download PHY-ZS-004 Electromagnetic Induction
Document related concepts
Skin effect wikipedia , lookup
Electromotive force wikipedia , lookup
Van Allen radiation belt wikipedia , lookup
Magnetosphere of Jupiter wikipedia , lookup
Maxwell's equations wikipedia , lookup
Magnetosphere of Saturn wikipedia , lookup
Geomagnetic storm wikipedia , lookup
Friction-plate electromagnetic couplings wikipedia , lookup
Mathematical descriptions of the electromagnetic field wikipedia , lookup
Edward Sabine wikipedia , lookup
Magnetic stripe card wikipedia , lookup
Lorentz force wikipedia , lookup
Neutron magnetic moment wikipedia , lookup
Magnetometer wikipedia , lookup
Giant magnetoresistance wikipedia , lookup
Magnetic monopole wikipedia , lookup
Electromagnetism wikipedia , lookup
Magnetic field wikipedia , lookup
Magnetic nanoparticles wikipedia , lookup
Electromagnetic field wikipedia , lookup
Earth's magnetic field wikipedia , lookup
Magnetotactic bacteria wikipedia , lookup
Magnetohydrodynamics wikipedia , lookup
Multiferroics wikipedia , lookup
Magnetotellurics wikipedia , lookup
Magnetoreception wikipedia , lookup
Electromagnet wikipedia , lookup
Magnetochemistry wikipedia , lookup
Superconducting magnet wikipedia , lookup
Force between magnets wikipedia , lookup
Transcript
PHY-AP -11 Magnetism By Squadron Leader Zahid Mir CS&IT Department , Superior University Magnets • Magnets have been known for centuries. • The Chinese and Greeks knew about the “magical” properties of magnets. • The ancient Greeks used a stone substance called “magnetite” (an oxide of iron). They discovered that the stone always pointed in the same direction. Later, stones of magnetite called “lodestones” were used in navigation. • William Gilbert, an English physician, first proposed in 1600 that the earth itself is a magnet, and he predicted that the Earth would be found to have magnetic poles. What is Magnetism? • Magnetism is the force of attraction or repulsion of a magnetic material due to the arrangement of its atoms, particularly its electrons. Magnetic Needle • A magnetized steel rod that, when adjusted to swing in a horizontal plane, indicates the direction of the Earth’s magnetic field. • The “RED” end always point towards the geographical north, also known as “North-Seeking Pole” Magnetic Interactions • One magnet set up a magnetic field and the other magnet respond to that magnetic field. Magnet Field Magnet Magnetic Field of a Bar Magnet Magnetism First Law Like poles repel each other while unlike poles attract each other. Magnetic fields due to Current • Compass needle indicates the direction of magnetic field around a current carrying wire. • Magnetic field vanishes when current is switched off. This shows a direct link between electricity and magnetism
![magnetism review - Home [www.petoskeyschools.org]](http://s1.studyres.com/store/data/002621376_1-b85f20a3b377b451b69ac14d495d952c-150x150.png)
