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e/m Experiment
e/m Experiment

... coil consists of two circular coils mounted parallel to each other, and along a common axis. The coils are electrically connected in series. If a voltage is applied to the Helmholtz coil an electrical current will flow in the same direction in both coils. The Bfield from each coil will be oriented t ...
Lecture Notes - Mutual Inductance and Linear Transformers File
Lecture Notes - Mutual Inductance and Linear Transformers File

Lecture Notes - Mutual Inductance and Linear Transformers File
Lecture Notes - Mutual Inductance and Linear Transformers File

directed_reading_Magnetism and Electricity p518-52
directed_reading_Magnetism and Electricity p518-52

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Magnetism from Electricity

AP C UNIT 10 - student handout
AP C UNIT 10 - student handout

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RH-400

... - The arc produced by this welding machine is soft and stable in both high range and low range, making very easy to control it, regardless the type of electrode used. - The control AC voltage is rectified and regulated by a potentiometer, and applied to the primary coils of a saturable core reactor ...
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Different Types of Switches
Different Types of Switches

Electromagnets
Electromagnets

... conductive wire can also increase the strength of the electromagnet. Changing the wire is one just way to change an electromagnets strength. Another way to change the strength is to change the other part of the electromagnet: the magnetic core. Some magnets are naturally stronger than others, so usi ...
Section-A - CBSE PORTAL
Section-A - CBSE PORTAL

... 9. What is amplitude modulation? 10. Give three reasons that what the need for modulation is. Section-C 1. Derive the expression for the electric field due to charged non conductiong solid sphere. 2. In the circuit shown below, each battery is 6V and has an internal resistance 0.2 ohm. What is the r ...
PHY2054_f11-10
PHY2054_f11-10

... in the opposite direction to the field inside the solenoid ...
Detection of dc Voltages Generated in Multilayered Magnetic Thin
Detection of dc Voltages Generated in Multilayered Magnetic Thin

Document
Document

AP Physics – More Homework – 2
AP Physics – More Homework – 2

... uniform 1.70 T magnetic field. What are (a) the maximum and (b) the minimum magnitudes for the magnetic force this charge can experience? ...
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Faradays Law of Electromagnetic Induction and Lenz`s Law

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... Reflection of light, spherical mirrors, mirror formula. Refraction of light, total internal reflection and its applications, optical fibres, refraction at spherical surfaces, lenses, thin lens formula, lens-maker’s formula. Magnification, power of a lens, combination of thin lenses in contact. Refra ...
Worksheet 8.7 - Transformers
Worksheet 8.7 - Transformers

... 102 V power line, and the current in the secondary coil is 5.00 A. what is the current in the primary coil? 3) Near your home the voltage pf the power line is 3.6 x 103 V. The transformer between your home and the line reduces this voltage to 1.20 x 102 V. If the transformer is to deliver 2.4 x 103 ...
Ch21EMF - Mother Seton
Ch21EMF - Mother Seton

... Currents Induced currents can flow in bulk material as well as through wires. These are called eddy currents, and can dramatically slow a conductor moving into or out of a magnetic field. ...
Electricity and Magnetism Web Quest Name
Electricity and Magnetism Web Quest Name

... 17. Briefly explain what static electricity is? Charges that are not moving are static. 18. Now that you have explained static electricity, you are ready to try the balloon activity found on the site. Why does the balloon stick to the wall? The balloon was able to stick to the wall because the ballo ...
`magnetic field`.
`magnetic field`.

electricity
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... Here I've got some pieces of iron. They ------------------------------at all, they ----------------------------------------------, but if I put them along side these magnets like this, ............. one side so that the two magnets face each other once again, the two N poles -------------------, the ...
Question bank of physics - Kendriya Vidyalaya SAC, Vastrapur
Question bank of physics - Kendriya Vidyalaya SAC, Vastrapur

Sound Systems, Computer Memory, Seismograph, GFCI Inductance
Sound Systems, Computer Memory, Seismograph, GFCI Inductance

Magnetism
Magnetism

< 1 ... 99 100 101 102 103 104 105 106 107 ... 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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