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21.1 Magnets & Magnetic Fields
21.1 Magnets & Magnetic Fields

...  A magnetic field can be used to produce an electric current = electromagnetic Induction = generator effect  LT #3: Demonstrate and explain that moving a magnet near a wire will cause an electric current to flow in the wire (the generator effect) [Generators] ...
Magnetic Flux Faraday`s Law
Magnetic Flux Faraday`s Law

Vocabulary Terms
Vocabulary Terms

... Electricity: Energy produced when electrons flow from one atom to another. Electricity is generated by passing a wire through a magnetic field or by rotating a magnet past a wire. There are two basic kinds of electricity-static and current; Static: Build up of electrons and then passing them on Curr ...
Number 1 - HomeworkNOW.com
Number 1 - HomeworkNOW.com

Chapter 17 - Northern Highlands
Chapter 17 - Northern Highlands

... The magnetic field of a straight wire  The direction of the field depends on the direction of the current in the wire.  The right-hand rule can be used to tell how the magnetic field lines point. ...
Magnetism - Mr. Treon
Magnetism - Mr. Treon

Electricity and Magnetism
Electricity and Magnetism

... The space around a magnet in which the force of the magnet acts is called magnetic field. The force of the magnet is more in the poles than in the middle of the magnet. ...
Biot Savart law Ampere`s circuital law Faradays laws of
Biot Savart law Ampere`s circuital law Faradays laws of

What is magnetism?
What is magnetism?

... • But if you try to bring two of the same poles (two norths or two souths) together they will repel each other. ...
Magnetism - Midland ISD
Magnetism - Midland ISD

... MAGNETISM AND ELECTROMAGNETISM ...
Study Guide - Chapter 33-1
Study Guide - Chapter 33-1

Slide 1 - Cobb Learning
Slide 1 - Cobb Learning

Magnetism
Magnetism

... A freely suspended magnet always comes to rest with one end pointing I a northerly direction. ...
Right-hand rule
Right-hand rule

PHYS 202 Force on a current carrying conductor
PHYS 202 Force on a current carrying conductor

... 22.56 can be used to measure field strength. The field is uniform, and the plane of the loop is perpendicular to the field. (a) What is the direction of the magnetic force on the loop? Justify the claim that the forces on the sides of the loop are equal and opposite, independent of how much of the l ...
Magnets
Magnets

Electromagnetic Induction - Lompoc Unified School District
Electromagnetic Induction - Lompoc Unified School District

Do now! - MrSimonPorter
Do now! - MrSimonPorter

... Can you continue with the ‘Draw the sentences’ from last lesson? This is to be FINISHED FOR HOMEWORK. Due next Friday 16th September. ...
Electromagnets and Induction
Electromagnets and Induction

...  By wrapping a wire around into a coil, current can be “reused” as many times  A coil with 50 turns of wire carrying 1 amp creates the same magnetic field as a single-wire loop with 50 amps ...
Diapositiva 1
Diapositiva 1

... produced by a magnet has similar pattern to the electric field lines produced by an electric dipole. The main difference is that the magnetic field lines are closed loop (they have no origin and no ending point) while electric field lines always originate from positive charges and end on negative ch ...
buds public school, dubai physics worksheet
buds public school, dubai physics worksheet

Magnetism guided reading
Magnetism guided reading

... 14. Even though we can’t see the magnetic field, how can we tell that it exists? ...
Magnetism guided reading
Magnetism guided reading

... 14. Even though we can’t see the magnetic field, how can we tell that it exists? ...
Mag Fields Pres New
Mag Fields Pres New

... Therefore moving a conductor in a (to make it move). field will cause a current to flow. This is electromagnetic induction. Or a varying magnetic field over a conductor will also cause a current. ...
SA1 REVISION WORKSHEET 3
SA1 REVISION WORKSHEET 3

... 1. What is the frequency of an alternating current if its direction changes after 0.01S? 2. How can it be shown that a magnetic field at a point near a wire related to the strength of the electric current flowing in a wire? 3. Name the physical quantity whose SI unit is Wb-m2. I sit a scalar quantit ...
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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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