Some materials have a feature known as ferromagnetism. The prefix "ferro" refers to Iron‚ which is one such material. Ferromagnetic materials have the ability to "remember" the magnetic fields they have been subjected to. An atom consists of a number of negatively charged electrons‚ orbiting around a positively charged nucleus. These electrons also possess a quantity known as spin‚ which is roughly analogous to a spinning top. The combination of orbital and spin motions is called the angular momentum
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| Two small spheres‚ each with mass m = 3.0 g and charge q‚ are suspended from a point by threads of length L = 0.22 m. What is the charge on each sphere if the threads make an angle = 15º with the vertical? | | A) 0.79 C B) 2.9 C C) 75 mC D) 6.3 C E) 0.11 C | | | | Three charges‚ each of Q = 3.2 10–19 C‚ are arranged at three of the corners of a 20-nm square as shown. The magnitude of the electric field at D‚ the fourth corner of the square‚ is approximately
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SUMMARY Magnetic levitation is the process of levitating an object by exploiting magnetic fields. If the magnetic force of attraction is used‚ it is known as magnetic suspension. If magnetic repulsion is used‚ it is known as magnetic levitation. In the past‚ magnetic levitation was attempted by using permanent magnets. Earnshaw’s theorem however‚ proves that this is mathematically impossible. There exists no arrangement of static magnets of charges that can stably levitate an object. There
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Sustainable Energy 1. How can electricity be defined? Electricity can be defined as the flow of electrical power or charge. It is a type of energy fuelled by the flow of electrons from positive and negative points within a conductor. 2. What is an electrical circuit? 3. What components are required to create an electrical circuit? In order to create an electrical circuit‚ you need: a) A source of electric power (battery or generator) b) A load to absorb the power (lamp
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SURVEY QUESTIONAIRE Topic: PERCEPTION OF PREPAID ELECTRIC METERING SYSTEM OF LAOAG CITY RESIDENTS Name: _______________________________________Age: ____ Status: ( ) Single ( ) Married Address: _____________________________________________ Gender: ( ) Male ( ) Female Please answer the following questions: 1. Are you aware about the prepaid electrical metering system? Why? ( ) Yes ( ) No ______________________________________________________________________________________
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WIRELESS VIBRATION MEASUREMENT SYSTEM Vibrations are caused due to mechanical oscillation of a structure about an equilibrium point. There will be vibrations involved everywhere where there is any rotating system‚ mechanical system is involved. The vibrations involved at in these places will of high frequency. There will some places where the vibrations of lo0w frequency will be present which will also disturb the normal operation of the system or faultiness in the values measured by the system
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Nicole Calhoun Writing Assignment Period 7th September 16‚ 2014 JJ Thomson JJ Thomson’s full name is Joseph John Thomson. Thomson was born on December 18‚ 1856. He was born near Manchester‚ England. Emma Thomson was his mother and she came from a family that owned a company that made produced cotton. Joseph James Thomson was his father and he was a bookseller. Thomson’s father wanted him to become and engineer. He went to his first college at the age of 14. Later‚ he attended Trinity College
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The electron charge to mass ratio is a widely known in the scientific field as a value that measures the charge of a standard electron versus its mass. Once the electron is accelerated by a voltage difference the potential energy is then converted to kinetic energy. When an electron is placed into a magnetic field it experiences a force that is perpendicular to the velocity of the electron and the magnetic field. This causes the electron to move in the pattern of a circle‚ and centripetal force is
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Wire Symbols Electrical Wire Conductor of electrical current Connected Wires Connected crossing Not Connected Wires Wires are not connected Switch Symbols and Relay Symbols SPST Toggle Switch Disconnects current when open SPDT Toggle Switch Selects between two connections Pushbutton Switch (N.O) Momentary switch - normally open Pushbutton Switch (N.C) Momentary switch - normally closed DIP Switch DIP switch is used for onboard configuration SPST Relay Relay open
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A cardboard is a moving part of the given hand made microphone. When a sound wave strikes the diaphragm (cardboard in the following experiment) of the microphone‚ the diaphragm vibrates back and forth‚ and the attached coil moves along with it. Additionally‚ magnet is attached with coils on a cardboard. When the coil alternately approaches and move back from the magnet‚ the flux through the coil changes. As a result of this‚ an ac emf is induced in the coil. Next‚ this electrical signal is sent to
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