# "Magnetic Field" Essays and Research Papers

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### Magnetic Field

﻿Magnetic Fields PHY 114 Lab Report 10/23/2013 Abstract: The purpose of this experiment was to surrounding a magnet there is a magnetic field. The magnetic field is analogous to the electric field that exists in the space around electric charges. Like the electric field, the magnetic field has both a magnitude and a direction. The direction of the magnetic field at any point in space is the direction indicated by the north pole of a small compass needle placed at that point. Since electric...

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### Magnetic Field and Differential Form

Ampere's Law The line integral of the magnetic flux around a closed curve is proportional to the algebraic sum of electric currents flowing through that closed curve; or, in differential form curl B = J. This was later modified to add a second term when it was incorporated into Maxwell's equations. Archimedes' Principle A body that is submerged in a fluid is buoyed up by a force equal in magnitude to the weight of the fluid that is displaced, and directed upward along a line through the center...

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### Magnetic Field and Electromagnet

magnet. In this study we want to show that the electric current passes through the coil round around the screw, it creates a magnetic field that reaches out in expanding circles. When wire carrying electricity is twisted into a coil. The magnetic field twists with the coiled wire, causing the magnetic field lines to concentrate inside the coil. This creates a powerful magnetic effect inside the coil. Chapter 1 THE PROBLEM AND ITS SETTING Introduction An electromagnet is formed when a current...

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### Earths Magnetic Field

Earth’s Magnetic Field Introduction Earth's magnetic field is one of the world's most complicated features. It started to be observed in 1845 by a scientist named Carl Friedman Gauss (Sarfati). The magnetic field is generated inside of the earth's core and there are many scientists who still debate over how it was first created. There are also many arguments about the many changes that the field has gone through in it's existence. These arguments are mostly either for a young-earth model or...

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### Affect of Earths magnetic field on people

﻿ Effect of The Earth’s magnetic field By X 9h Earth’s Magnetic Field Introduction Our Earth is a huge bar magnet tilted 11 degrees from the spin axis of the Earth, with geographic north pole being earth’s magnetic south pole and vice versa. Similar to how a magnet has a magnetic field surrounding it, our Earth also has its own magnetic field. The earth’s magnetic field is formed in the earth’s core due to a process known as the dynamo effect. According to dynamo effect...

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### Magnetic Force

5: Magnetism Magnetic Fields 1. An electron gun fires electrons into a magnetic field directed straight downward. Find the direction of the force exerted by the field on an electron for each of the following directions of the electron’s velocity: (a) horizontal and due north; (b) horizontal and 30° west of north; (c) due north, but at 30° below the horizontal; (d) straight upward. 2. (a) Find the direction of the force on a proton moving through the magnetic fields in Figure 1, as shown...

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### Magnetic Materials

TYPES OF MAGNETIC MATERIALS Paramagnetic materials have a small, positive susceptibility to magnetic fields. These materials are slightly attracted by a magnetic field and the material does not retain the magnetic properties when the external field is removed. Paramagnetic properties are due to the presence of some unpaired electrons, and from the realignment of the electron paths caused by the external magnetic field. Paramagnetic materials include magnesium, molybdenum, lithium, and tantalum...

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### Magnetic Materials

a rather low intensity magnetic field. Alnico magnet alloy is now mainly used in applications where the magnet will be exposed to elevated temperatures. • Rare Earth Magnets Samarium Cobalt (SmCo) and Neodymium Iron Boron (NdFeB) are called Rare Earth because Neodymium and Samarium are found in the rare earth elements on the periodic table. Both Samarium Cobalt and Neodymium magnet alloys are powdered metals which are compacted in the presence of a strong magnetic field and are then sintered. ...

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### Magnetic Flux

Production of magnetic flux A rotating magnetic field in the stator is the first part of operation. To produce a torque and thus rotate, the rotors must be carrying some current. In induction motors, this current comes from the rotor conductors. The revolving magnetic field produced in the stator cuts across the conductive bars of the rotor and induces an e.m.f. The rotor windings in an induction motor are either closed through an external resistance or directly shorted. Therefore, the e.m.f induced...

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### Magnetic Force on a Moving Charge

﻿Lab V, Problem 8: Magnetic Force on a Moving Charge John Greavu Partners: Hannah Eshenaur and David Sturg August 15, 2013 Physics 1302W, Professor: John Capriotti, TA: Barun Dhar Objective In order to improve the design of an electron microscope, we attempted to use a magnetic field to control the electron beam. Utilizing a cathode cay tube (CRT), we oriented a magnetic field perpendicular to the axis of the CRT’s electron beam. From previous experience, we decided on using Helmholtz coils to...

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