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Chapter 7: Magnetism and Its Uses
Chapter 7: Magnetism and Its Uses

What is a fuse and how it works
What is a fuse and how it works

Course Schedule, Syllabus and Grading Policy
Course Schedule, Syllabus and Grading Policy

... boundary value problems, a conducting sphere ( either grounded or nongrounded ) will be a good problem to solve, in this regard the method of images will also be introduced to students. Also the electrostatics in dielectric media which will include the solution of Laplace equation in dielectric medi ...
induced magnetic field
induced magnetic field

... A step-up transformer, with N2 >> N1, can boost the voltage of a generator up to several hundred thousand volts. Delivering power with smaller currents at higher voltages reduces losses due to the resistance of the wires. High-voltage transmission lines carry electric power to urban areas, where ...
PHYS 221 Recitation
PHYS 221 Recitation

The circuits and magnetism game
The circuits and magnetism game

When no current is present, all the compass
When no current is present, all the compass

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PPT

Please Do Now! - Bloomsburg Area School District
Please Do Now! - Bloomsburg Area School District

اﻟﻔﯾزﯾﺎء ( ﺑﺎﻟﻟﻐﺔ اﻻﻧﺟﻟﯾزﯾﺔ
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... 2) If the capacitance of a capacitor in an AC circuit is increased to its double. (with respect to its capacitive reactance). 3) If the intensity of incident light on a metal surface (whose frequency is greater than the critical frequency) in an evacuated tube is increased to double. (with respect t ...
L15 Electromagnetic induction and inductance
L15 Electromagnetic induction and inductance

Electro Magnet
Electro Magnet

Magnetic field
Magnetic field

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Problem Set 9

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Generating Electricity

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... 13. Explain why auroras are seen mostly near the North Pole and South Pole. Auroras are usually seen near Earth’s magnetic poles. Earth’s magnetic poles are located near Earth’s geographic North and South Poles. 14. Explain why some pieces of iron are more magnetic than others. Some pieces of iron a ...
Transcranial Magnetic Stimulation(TMS)
Transcranial Magnetic Stimulation(TMS)

Electricity and Magnetism
Electricity and Magnetism

... 15. Maxwell’s equations, production of electromagnetic waves 16. Energy of EM waves, the Poynting vector, radiation pressure Laboratory experiments 1. Plane capacitor and dielectric constant of different materials 2. Ohm’s law in DC circuits 3. Capacitor and inductivity in DC circuit 4. Electromagne ...
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... Directions: Play around with the website so that you can answer the questions about the solenoid. 1. What happens to the compass as the current is increased? 2. What happens when the “current direction” box is checked? 3. What happens when the “magnetic field vector” box is checked? 4. What happens ...
Lecture 17 - Purdue Physics
Lecture 17 - Purdue Physics

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Electromagnetism ()

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Physics Form 5 Syllabus

step up transformer
step up transformer

Name_________________________ Section 1 Magnetism
Name_________________________ Section 1 Magnetism

Physics 202 Midterm Exam 2 Practice Exam
Physics 202 Midterm Exam 2 Practice Exam

... 2. Answer all multiple questions in this test book by indicating the best answer among choices. You must do this both on your test book and on your Scantron sheet. Follow instructions on the Scantron sheet on how to mark valid answers. 3. When you finish, you need to turn in both this test book and ...
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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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