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Lesson 5 Magnetism and Electricity Notes
Lesson 5 Magnetism and Electricity Notes

... Has the same parts as a motor (power source, magnet, and wire loop attached to a shaft). ...
Electromagnetic Induction
Electromagnetic Induction

... Where F force on conductor (N), B = magnetic field strength (T), I = current in conductor (A) and L = length of conductor in magnetic field (m) A current flowing parallel to a magnetic field experiences no force. The formula has been generalised, noting that the force is zero when the angle is zero ...
Lecture 7 Extra
Lecture 7 Extra

Strain Sensors 14th June, 2013 Kaustubh Shinde and Obi Igwe
Strain Sensors 14th June, 2013 Kaustubh Shinde and Obi Igwe

P3 Revision 2016 File
P3 Revision 2016 File

... accelerates towards the centre of the circle. This centripetal acceleration is because the objects velocity is changing because its direction is changing. P = pressure in Nm-2 or Ncm-2 or Pa Acceleration is the rate of change of velocity. F is force in Newtons A is X sectional area in cm-2 or m-2 ...
HW8
HW8

... 3. A transformer is supplying power to a neon sign. These are special transformers called ballasts. The neon tube is basically an open circuit when we turn on the power. If we can apply a high voltage (~10 kV) the tube breaks down and we have approximately a short circuit and the gas glows. We have ...
8. Magnetic fields
8. Magnetic fields

Induction AP/IB
Induction AP/IB

Name_________________________________
Name_________________________________

... 12. If the gases of a space ship press down and the space ship flies up, which of Newton’s Laws best describes this scenario? _________________________________________________________________ 13. When electrons flow through a wire it is known as a(n) a. electric current b. magnetic field c. electric ...
4th grade Physical Science Part 2
4th grade Physical Science Part 2

... magnets by using like poles to repel and the opposite poles to attract, making the ...
Chapter 20
Chapter 20

ELECTROMAGNETIC INDUCTION AND ALTERNATING CURRENT
ELECTROMAGNETIC INDUCTION AND ALTERNATING CURRENT

... A wheel with 10 metallic spokes each 0.5 m long is rotated with a speed of 120 rev/min in a plane normal to the horizontal component of earth’s magnetic field at a place. If BH = 0.4 G at the place .What is the induced emf between the axle and the rim of the wheel? 25. Two circular coils, one of ra ...
Lecture10 - madalina
Lecture10 - madalina

Advanced Analog Circuits
Advanced Analog Circuits

... • Time Constant (T): way to characterize time to charge/discharge a capacitor or inductor • 1*T: 63% of the maximum charge • 5*T: fully charged ...
Solutions Manual
Solutions Manual

... Michael Faraday discovered that a voltage is induced in a length of electric wire moving in a magnetic field. The induced voltage may be increased by using a stronger magnetic field, increasing the velocity of the conductor, or increasing the effective length of the conductor. 15. Critical Thinking ...
Rad T 110
Rad T 110

Practice Sheet #24
Practice Sheet #24

... _____ 5. In the region around a magnet in which magnetic forces act exists the a. magnetic field. c. pole. b. domain. d. solenoid. _____ 6. An electric fan has an electric motor inside to change a. mechanical energy into electrical energy. b. thermal energy into electrical energy. c. electrical ener ...
Chapter 29 Electromagnetic Induction
Chapter 29 Electromagnetic Induction

Review of Basic Electrical and Magnetic Circuit Concepts
Review of Basic Electrical and Magnetic Circuit Concepts

Energy_Impact on Global - Saint Leo University Faculty
Energy_Impact on Global - Saint Leo University Faculty

... • 1820: Link discovered between electricity and magnetism establishing field of study called “electromagnetism” • An electric current creates a magnetic field ...
Flux or flux linkage? - Institute of Physics
Flux or flux linkage? - Institute of Physics

LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034
LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

Magnetism and its uses
Magnetism and its uses

Faraday`s Law of Induction
Faraday`s Law of Induction

Notes17
Notes17

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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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