PPT-Electromagnetism

Objectives SPI 0807121 Recognize that electricity can be produced using a magnet and wire coil SPI 0807122 Describe the basic principles of an electromagnet SPI 0807123 Distinguish among the Earths magnetic field a magnet and the fields that surround a magnet and an electromagnet. PHYSICAL LAW We are told that our present understanding of physical law was ushered in by the Quantum Revolution which began around 1900 and was brought to fruition around 1930 with the formulation of modern Quantum Mechanics The photon was supposed 1 Electric and 64257elds 1 111 Electrostatic Force 1 112 Uniform electric 64257elds Knowing about the properties of electromagnets is a crucial underpinning for understanding how magnetic 57374elds are generated in nature in the surface of the Sun and in the interior of Earth In preparation for this activity or as a followup please Electric Current and Magnetism. In 1819, Hans Christian . Oersted. , a Danish physicist and chemist, and a professor, placed a compass needle near a wire through which he could make electric current flow. . Have you ever heard of electromagnetism? If so, what is it? . . If not what do you think it is?. Bellringer. Take a stroll down science history lane to investigate the discovery of one of my personal favorite areas of physics!. Corinne . Manogue. and the whole Paradigms Team. physics.oregonstate.edu/paradigms. Philosophy of the Paradigms. Our approach teaches physics as physicists think about it, namely in terms of concepts that broadly underlie the various subfields: energy, symmetry, wave motion, rotations and so forth. . 3 2 Electromagnetism OCABULARYRemember to record current-carrying wire current-carrying wire Uses of ElectromagnetsBecause electromagnets can be turned on and off,they have more usesthan permanent mag Surrounding every magnet is area where they are able to exert a force on “ferromagnetic” objects.. *A ferromagnetic material is one that is both attracted to a magnet, and can become magnetized such as iron, nickel or cobalt.. g. eraint.lewis@sydney.edu.au. PHYS 1902. Chapter 27 . Magnetic Field and Magnetic . Forces. . Magnets. Magnets have two poles. - historically, north (N) and south (S). Break a magnet, and each piece has two poles. g. eraint.lewis@sydney.edu.au. PHYS 1902. Chapter 29 . Electromagnetic Induction. . Electromagnetic . induction. Main idea:. a . time-varying. magnetic field can act as a source of the electric field. Made from alloys of iron, nickel and cobalt. Each Magnet has two poles!. Magnetic poles are areas of concentrated magnetic force. When left to rotate freely,. One pole will seek (point to) the northerly direction on Earth – referred to as North Pole. Motional EMF. Consider a conducting wire moving through a magnetic field.. Induced EMF .  . Magnetic Flux.  . Three examples of a circular loop in a magnetic field. Faraday’s Law of Electromagnetic Induction. Roygbiv. Parabolic Dish. Antennas detect Radio waves from space, even distant galaxies.. We use electromagnetic waves to send signals for satellite & TV’s.. . Electromagnetic Video. Greenhouse Effect. Ezio. . Todesco. European Organization for Nuclear Research (CERN). A digression on divergences in electromagnetism - . 2. FOREWORD. The . equations. . ruling. the construction of an . electromagnet.