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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induced there are two types of tachogenerators: 1. DC tachogenerator 2. AC tachogenerator PRINCIPLE It operates on the principle of Faraday’s Laws of Electromagnetic induction . It states that whenever there is a relative motion between the magnetic field and a conductor ‚ then the voltage is generated in that conductor. Characteristic requirements of tachogenerator: Accuracy: The input to the tachogenerator is
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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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caring conductor is placed in magnetic field then a force is generated on current caring conductor. F = BIL. Sinθ If all three B and L are Perpendicular to each other‚ then F = BIL If a conductor is moving in magnetic field then an EMF is generated in a conductor . E = BVL. Sinθ E = BVL If B is Perpendicular to V Basic Principles For magnetic field density (B): 1. Magnetic Fields: Direction of Field: North South 2. Electro Magnetic Fields: - Current caring conductor
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AS Level Physics: Terms & Definitions:- Measurement Random errors are errors of measurements that result in a scatter of readings about a mean value. Systematic errors are errors of measurement which occur according to some fixed patterns such that they consistently give out an over-estimation or under-estimation of the true value. Accuracy is a measure of how close the results of an experiment agree with the true value. Precision is a measure of how close the results of an experiment
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the years EM came to stand for electromagnetic‚ referring to the way the units actuate‚ but their basic operation has not changed. Electromagnetic clutches come in many forms‚ including tooth‚ multiple disc‚ hysteresis‚ and magnetic particle. However‚ the most widely used version is the singleface design. ABOUT ELECTROMAGNETIC CLUTCH These electromagnetic clutches are designed to have a very high torque to size ratio. They include longlife
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