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How can you make the field stronger? Add more loops!!!
How can you make the field stronger? Add more loops!!!

... 0Magnetic Fields and Magnetic force and Electromagnetic Induction A. Magnetic Fields – permanent magnets 1. What are permanent magnets made of? Why can these materials ...
☺ PLAN 1. Ampere’s law 2. Applications
☺ PLAN 1. Ampere’s law 2. Applications

... Biot-Savart law Ù Ampere’s law r r r Plus: FB = qv × B ...
Chapter 1 Test – Electricity
Chapter 1 Test – Electricity

Slide 1
Slide 1

... Force tends to slow loop down (drag force) Magnitude of force: ...
Year 9 Magnetism summary sheet
Year 9 Magnetism summary sheet

... A north pole and a south pole attract each other. Two north poles or two south poles will repel each other. The space around a magnet where it has an effect is called its magnetic field. ...
magnetic field - DiMaggio
magnetic field - DiMaggio

...  To line the domains up, just rub a magnet on the iron, cobalt, or nickel object in 1 direction! Destroying (demagnetizing) a Magnet:  hammering it  dropping it  heating it  What would happen if a magnet was cut in half? o You would create 2 smaller magnets with new smaller poles! Electromagnet ...
Electricity and Magnetism
Electricity and Magnetism

Module code SP-1202 Module Title Electricity and Magnetism
Module code SP-1202 Module Title Electricity and Magnetism

5H10.11 - Compass Needles and Magnet
5H10.11 - Compass Needles and Magnet

... combinations of dipoles. Hence, the field lines must begin and end at opposite poles. The B-field vectors are tangent to the lines at all points. ...
Magnetism & electromagnetic
Magnetism & electromagnetic

Electromagnetic induction
Electromagnetic induction

... as an immobile electric charge does not produce a magnetic field. The movement of a magnet in relation to a conductor results in the flow of current across the conductor, just as the movement of charges in a conductor produces a magnetic field. The phenomenon of electric-current induction by a chang ...
Electromagnetic induction
Electromagnetic induction

Fundamental nuclear symmetries meet classical electrodynamic
Fundamental nuclear symmetries meet classical electrodynamic

forcibly push - Cloudfront.net
forcibly push - Cloudfront.net

Magnetism - Howard Elementary School
Magnetism - Howard Elementary School

... There are 2 main ways that magnets are similar to electric charges: like charges repel and opposites attract, and the force between is inversely proportional to the distance between them. This means that closer is stronger, and further is weaker. Electric charges are positive or negative, magnetic p ...
File - Lanier Bureau of Investigation
File - Lanier Bureau of Investigation

... Generator – a device that uses electromagnetic induction to convert kinetic energy into electrical energy Electric force – the push or pull from the repelling or attraction of opposite charges Electromagnet - a magnet that consists of a solenoid wrapped around an iron core. 1. What is the Law of Ele ...
PHYS 221 Recitation
PHYS 221 Recitation

... Faraday’s Law • What does it tell me? – A changing magnetic field creates a non-conservative electric field – Anything that affects that flux integral induces an EMF in a loop ...
File - Lanier Bureau of Investigation
File - Lanier Bureau of Investigation

... magnetite are the only types 3. Temporary magnet – b) becomes a magnet near a magnet, then loses its magnetism when moved away 4. True north – d) The North Pole; where maps point to as north 5. Magnetic north - a) Where the a compass points to (in Hudson Bay, Canada) ...
Fundamental nuclear symmetries meet classical electrodynamic
Fundamental nuclear symmetries meet classical electrodynamic

... History of magnetism • The magnetic force was known in antiquity – Magnetism more predominant in nature but more difficult to quantify: ...
24-1 Magnets: permanent & temporary
24-1 Magnets: permanent & temporary

Chapter27_11
Chapter27_11

... http://gsc.nrcan.gc.ca/geomag/nmp/daily_mvt _nmp_e.php ...
Chapter #2 Test Review (Jeopardy)
Chapter #2 Test Review (Jeopardy)

... A device that converts mechanical energy into electrical energy. ...
Magnetism
Magnetism

Presentations
Presentations

... “I'm not sure I comprehend the drawing correctly, but I think the reaction would gravitate upward in reaction to the north pole of the magnet.” “since the loop is not moving there is no energy produced.” ...
cp19
cp19

... (6) What is the direction of the magnetic field at the point A due to the currents on two infinitely long wires as shown? ...
< 1 ... 111 112 113 114 115 116 117 >

Eddy current

Eddy currents (also called Foucault currents) are circular electric currents induced within conductors by a changing magnetic field in the conductor, due to Faraday's law of induction. Eddy currents flow in closed loops within conductors, in planes perpendicular to the magnetic field. They can be induced within nearby stationary conductors by a time-varying magnetic field created by an AC electromagnet or transformer, for example, or by relative motion between a magnet and a nearby conductor. The magnitude of the current in a given loop is proportional to the strength of the magnetic field, the area of the loop, and the rate of change of flux, and inversely proportional to the resistivity of the material.By Lenz's law, an eddy current creates a magnetic field that opposes the magnetic field that created it, and thus eddy currents react back on the source of the magnetic field. For example, a nearby conductive surface will exert a drag force on a moving magnet that opposes its motion, due to eddy currents induced in the surface by the moving magnetic field. This effect is employed in eddy current brakes which are used to stop rotating power tools quickly when they are turned off. The current flowing through the resistance of the conductor also dissipates energy as heat in the material. Thus eddy currents are a source of energy loss in alternating current (AC) inductors, transformers, electric motors and generators, and other AC machinery, requiring special construction such as laminated magnetic cores to minimize them. Eddy currents are also used to heat objects in induction heating furnaces and equipment, and to detect cracks and flaws in metal parts using eddy-current testing instruments.
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