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Why do things move? - Utah State University
Why do things move? - Utah State University

Chapter 6 Handouts_6 - Bakersfield College
Chapter 6 Handouts_6 - Bakersfield College

... when the current is perpendicular to the magnetic field. Currents exert magnetic forces on each other. The forces are attractive when parallel currents are in the same direction and are repulsive when the parallel currents are in opposite directions. ...
Lecture 12: Electromagnetic Induction
Lecture 12: Electromagnetic Induction

Transformers
Transformers

... Transformers To make a coil of wire, we simply curl the wire round into loops or "turns". If the second coil has the same number of turns as the first coil, the current in the second coil will be virtually the same size as the one in the first coil. But (and here's the clever part) if we have more ...
lecture29
lecture29

... magnetic field is 0.625 T. If one of the particles is H and the other particle hits the photographic plate 110 cm further away than the H atom, what chemical element is the second particle? Let’s first determine the distance from the entrance point that the H atom hits the ...
Curved Surfaces also reflect light. One example is a Spherical Mirror
Curved Surfaces also reflect light. One example is a Spherical Mirror

Experimental Verification of Filter Characteristics Using
Experimental Verification of Filter Characteristics Using

... 3. By using a special arrangement of coils called Helmholtz coils, we can calculate the magnetic field if we know the radius of the coils, the number of turns in each coil, and the current through the coils. ...
θ B 21.2 Faraday’s Law of Induction and Lenz’s Law
θ B 21.2 Faraday’s Law of Induction and Lenz’s Law

magnetic
magnetic

... current passing through the coil. Such "meter movements" were at the heart of the moving coil meters such as voltmeters and ammeters until they were largely replaced with solid state meters which have digital readouts. ...
Slide 1
Slide 1

... :: A circuit which contain at least a resistor (R) and a capacitor (C)  simply called RC circuit :: A circuit which contain at least a resistor (R) and an inductor (L)  simply called RL circuit :: Analysis on these RC or RL circuits gives the first order differential equation :: RC and RL circuits ...
Please read.
Please read.

... earth’s magnetic field at a place where the latter is 2 x 10-5 T. What should be the current in the solenoid be in order that its field exactly cancel the earth’s field inside the solenoid? (You ...
Chapter 16: Electromagnets and Induction
Chapter 16: Electromagnets and Induction

Permanent magnets Electromagnets
Permanent magnets Electromagnets

... magnets from iron, nickel, cobalt, neodymium, samarium. ...
MH lect 26
MH lect 26

... Suppose Lenz’s law were reversed, then I would be reversed and F would go right and the bar would be accelerated to the right, w/o need of external positive work and heat would be dissipated at the same time. The is violates cons. of Energy, so Lenz’s law is correct. ...
Magnetism
Magnetism

Applications of Electromagnetic Induction Science Mathematics
Applications of Electromagnetic Induction Science Mathematics

... primary power source that exerts a torque on the rotor. A common example of the primary energy source is burning coal and a steam turbine. ...
How electromagnetism works
How electromagnetism works

Electricity & Magnetism
Electricity & Magnetism

Electromagnetic Induction Key Concept is Magnetic Flux
Electromagnetic Induction Key Concept is Magnetic Flux

1. A magnetic compass needle is placed in the plane... as shown in Figure. In which plane should a straight... X- Guess Questions solved SA-1: Magnetic effects of currents
1. A magnetic compass needle is placed in the plane... as shown in Figure. In which plane should a straight... X- Guess Questions solved SA-1: Magnetic effects of currents

Electromagnetic Bomb
Electromagnetic Bomb

Ph12-Lab5F
Ph12-Lab5F

... Note: the animations all demonstrate Real Current. Conventional current is the opposite direction 5. As the bar magnet enters the coil from the left, draw (see example) a Right-Hand-Rule to describe the conventional current flow. Remember, thumb always points north. (1 mark) Conventional current is ...
Spintronics Integrating magnetic materials with semiconductors
Spintronics Integrating magnetic materials with semiconductors

EE302 Lesson 1: Introduction
EE302 Lesson 1: Introduction

Notes Sec 4.1
Notes Sec 4.1

< 1 ... 115 116 117 118 119 120 121 122 123 ... 153 >

Magnetic core

A magnetic core is a piece of magnetic material with a high permeability used to confine and guide magnetic fields in electrical, electromechanical and magnetic devices such as electromagnets, transformers, electric motors, generators, inductors, magnetic recording heads, and magnetic assemblies. It is made of ferromagnetic metal such as iron, or ferrimagnetic compounds such as ferrites. The high permeability, relative to the surrounding air, causes the magnetic field lines to be concentrated in the core material. The magnetic field is often created by a coil of wire around the core that carries a current. The presence of the core can increase the magnetic field of a coil by a factor of several thousand over what it would be without the core.The use of a magnetic core can enormously concentrate the strength and increase the effect of magnetic fields produced by electric currents and permanent magnets. The properties of a device will depend crucially on the following factors: the geometry of the magnetic core. the amount of air gap in the magnetic circuit. the properties of the core material (especially permeability and hysteresis). the operating temperature of the core. whether the core is laminated to reduce eddy currents.In many applications it is undesirable for the core to retain magnetization when the applied field is removed. This property, called hysteresis can cause energy losses in applications such as transformers. Therefore, 'soft' magnetic materials with low hysteresis, such as silicon steel, rather than the 'hard' magnetic materials used for permanent magnets, are usually used in cores.
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