Investigating Factors that Affect the Strength of an Electromagnet Aim: To investigate the factors‚ which affect the strength of an electromagnet‚ also known as it’s‚ pick up power. Predictions: The more coils of wire used on the electromagnet then the greater number of paper clips picked up. Also The greater the current the greater the number of paper clips picked up. There will also be a limit to the amount of magnetism created and how many paper clips can be picked up
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College Physics OpenStax College Rice University 6100 Main Street MS-380 Houston‚ Texas 77005 To learn more about OpenStax College‚ visit http://openstaxcollege.org. Individual print copies and bulk orders can be purchased through our website. © 2013 by Rice University. The textbook content was produced by OpenStax College and is licensed under a Creative Commons Attribution 3.0 Unported License. Under the license‚ any user of the textbook or the textbook content herein must provide proper attribution
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magnet and a stator that is of electromagnets The following figure shows the construction of a practical stepper motor: Now when we gives supply to stator’s winding. There will be a magnetic field developed in the stator. Now rotor of motor that is made up of permanent magnet‚ will try to move with the revolving magnetic field of stator. This is the basic principle of working of stepper motor. Now we are going to discuss its types. In this note you will find the real method of working of specific type
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k/T >>1 2.6.1.2. Energy Transfer Without k/T >>1 2.6.1.3. Influence of k/T on the Total Energy of the System 2.6.2. Dielectric Disks 2.6.3. Capacitively-loaded conducting wire loops 3. WiTricity 3.1. What WiTricity is not? 3.1.1. Traditional Magnetic Induction 3.1.2. Radioactive Power Transfer 3.1.3. MRI 3.2. What WiTricity is? 3.3. Why WiTricity? 3.4. Range 3.5. Evanescent Waves 3.6. How it works 4. Prototype Circuit 4.1.
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Department of Applied Physics Electricity and Magnetism Assignment # 2 Due Date: 15 November 2013 1. a) Write brief notes on the Hall effect. Show on a diagram the polarity of the Hall Voltage‚ together with a given current and magnetic field direction‚ assuming the charge carriers to be conduction electrons. [5] b) Define electric dipole and the electric dipole moment. Write down an expression‚ in vector form‚ and show graphically the electric field intensity at point P on
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Lab Worksheet 1. Explain what it means when we say a substance is magnetic. It means that the substance has a lot of electrons that are creating magnetic fields. 2. Discuss the relationship between electric and magnetic fields. An electromagnetic wave generates both‚ electric and magnetic fields. A magnetic field can be induced by a wire conducting an electric current and a electric field can be induced in a coiled piece of copper wire if a magnet is moved through the center of the coiled wire
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directions they would repel. Discussion: This occurs due to the magnetic field created by the current. When the current is travelling in the same directions the north and south magnetic fields are closer and cause it to attract but when they are opposite the south and north fields are closest causing it to repel. Analysis: All electric currents cause magnetic fields and using the right hand rule‚ we can find which way the magnetic field is going by the direction the current
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idea of GMR is based on the change in the resistance of very thin (scale of nanometers) ferromagnetic materials when an external magnetic field is applied. The term “Giant” is to describe the size of the change in the resistivity in the order of 10% to 20%‚ considered to be enormous compared to the response of other magnetic sensors in the presence of an external magnetic field. Let us proceed with a historical overview‚ beginning from the original perception of the idea up to the creation of the
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starting point for advanced courses‚ but are usually first encountered as unifying equations after the study of electrical and magnetic phenomena. Symbols Used | E = Electric field | ρ = charge density | i = electric current | B = Magnetic field | ε0 = permittivity | J = current density | D = Electric displacement | μ0 = permeability | c = speed of light | H = Magnetic field strength | M = Magnetization | P = Polarization | Integral form | Differential form | | Index Maxwell’s equations
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in which their compass needles can point either “up” or “down” in relation to a magnetic field. Spin therefore lends itself elegantly to a new kind of binary logic of ones and zeros. The movement of spin‚ like the flow of charge‚ can also carry information among devices. One advantage of spin over charge is that spin can be easily manipulated by externally applied magnetic fields‚ a property already in use in magnetic storage technology. Another more subtle (but potentially significant) property of
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