electricity and voice-coil speakers can also act as microphones. ------------------------------------------------- Applications Electromagnetic: * Antenna – converts propagating electromagnetic waves to and from conducted electrical signals * Magnetic cartridge – converts relative physical motion to and from electrical signals * Tape head‚ Disk read-and-write head -
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technology. But these motors suffer from many drawbacks. The field of ultrasonic seems to be changing that driving force. DRAWBACKS OF ELECTROMAGNETIC MOTORS Electromagnetic motors rely on the attraction and repulsion of magnetic fields for their operation. Without good noise suppression circuitry‚ their noisy electrical operation will affect the electronic components inside it. Surges and spikes from these motors can cause disruption or even damage in nonmotor related items
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susceptibility to an external magnetic field. They exhibit a strong attraction to magnetic fields and are able to retain their magnetic properties after the external field has been removed. Ferromagnetic materials have some unpaired electrons so their atoms have a net magnetic moment. They get their strong magnetic properties due to the presence of magnetic domains. In these domains‚ large numbers of atom’s moments (1012 to 1015) are aligned parallel so that the magnetic force within the domain is strong
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electrical only b. electrical and magnetic only c. magnetic and gravitational only d. electrical‚ magnetic‚ and gravitational 3. A charged particle experience a magnetic force only when it a. moves in the same direction as the magnetic field b. crosses magnetic field lines c. goes against gravity d. moves against an electric field 4. A proton beam travels at a constant velocity to the right as shown below. Use a drawing to help describe the magnetic field created by the beam. [Appendix
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when a current is goes through the wire ‚round lines of power are delivered around the wire. Those flux lines go in a heading depicted by the left-hand standard. The lines of power of the magnet go from the N shaft to the S post You can see that on one side of the wire‚ the attractive lines of power are going the other way accordingly the wire‚ flux lines contradict the magnet’s flux line. Since flux lines takes the easy way out‚ more lines focus on the opposite side of the wire transmitter‚ the lines
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P=(E)(E)/R 6. A magnetic blow out coil in a DC motor controller contactor functions to: Ans: Prevent contact melting 7. The device most commonly utilizing the principle of electromagnetic induction is: Ans: Transformer 8. A current at which a magnetic-type overload relay tends to trip may be decrease by raising the plunger further into the magnetic circuit of the relay.This action will: Ans: Increases magnetic pull on the plunger and
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Product Section‚ and the Magnetic Material Section‚ the following report keeping in view the interpersonal relation existing between the section managers‚ will help to decide whether to commercialize the manufacturing of the new magnetic component X-27. Best Regards‚ Ilene Carter‚ (Manager- Audio Products Section) Specialty Appliance Department Technotronics‚ Inc. EXECUTIVE SUMMARY There exists a contrast in the opinions of the Audio Product Section and the Magnetic Material Section concerning
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Appliance Department‚ Technotronics‚ Inc. Date: 3rd September 1979 Subject: Report on the decision concerning commercial operation of ‘X-27’. Dear Sir‚ In response to the interdepartmental dispute between the Audio Product Section and the Magnetic Material Section‚ this report offers administrative relief to both the managers keeping in view the interpersonal relations. This report from the Audio Products Section presents the decision concerning the commercial operation of ‘X-27’. Your
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of degrees that it was designed for when each pulse is delivered‚ you can control the pulses that are sent and control the positioning and speed. The rotor of the motor produces torque from the interaction between the magnetic field in the stator and rotor. The strength of the magnetic fields is proportional to the amount of current sent to the stator and the number of turns in the windings. The stepper motor uses the theory of operation for magnets to make the motor shaft turn a precise distance when
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An Introduction to Magnetic Therapy An Introduction to Magnetic Therapy Magnetic Therapy has risen greatly in popularity in the last three decades. As part in the general attention given to alternative medicine and drug-free palliative care‚ Magnet therapy (or magnotherapy) has blossomed into an industry worth an estimated five billion US dollars in 1999.[1] It is safe to assume that with the advent of Internet shopping‚ this figure has risen exponentially ever since. Magnetic products can be roughly
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