PHYS 2102 Final Exam Fall 2008 Name :________________________ Student # : _________________________ Section (circle one): 001 (Dr. Leilabady) 002 (Dr. Astratov) 092 (Dr. Aktas) You have 2 ½ hours to complete your answers There are 12 questions‚ 10 points each Exam graded out of 100 points (i.e. there is up to 20% bonus opportunity) This is a closed book exam. I understand I am not to use any notes or information other than on this exam sheet. I may use a pocket calculator
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Department of Electronics and Communication Engineering AU College of Engineering (Autonomous) Scheme of Instruction‚ Examination and Syllabus B.E. (Electronics and Communication) – 4 Year Degree Course Common Scheme of Instruction & Examination I/IV B.E./B.Tech (Four Year Course) – Semester System (with effect from 2006 – 2007 admitted batch onwards) First Year I & II Semesters Code No. ENG 1001 ENG 1002 ENG 1003 ENG 1004 ENG 1005 ENG 1006 ENG 1007 ENG 1008 ENG 1009 ENG 1010 ENG 1011 ENG 1012
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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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(corresponding to the rail tracks of conventional railways) by using electromagnetic forces between superconducting magnets on board the vehicle and coils on the ground. The following is a general explanation of the principle of Maglev. fig. 1.1 1.1.1 Magnetic Levitation The "8" figured levitation coils are installed on the sidewalls of the guideway. When the on-board superconducting magnets pass at a high speed about several centimeters below the center of these coils‚ an electric current is induced within
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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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distribution of magnetic flux lines when the iron ring was placed in between the U-magnets? The distribution of magnetic flux lines when the iron ring is placed in between the magnets‚ the iron ring is included in the distribution of flux lines. Instead of connecting to the other pole‚ the ring affects its distribution and some of it is attracted to the iron ring. 2. How does changing the current affect the magnetic force on a wire suspended in a magnetic field? As the current rises‚ the magnetic force
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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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robotics‚ mecatronics‚ electric vehicles‚ high speed transportation etc. SYNCHRONOUS RELUCTANCE MOTORS * A reluctance motor is a type of synchronous electric motor which induces non-permanent magnetic poles on the ferromagnetic rotor. * Torque is generated through the phenomenon of magnetic reluctance. Operating principle * Whenever a piece of ferromagnetic material is
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comparing it with the calculated value. Secondly the goal was to investigate the relationship between the emf and the frequency of the driving signal. The magnetic field was found to be uniform throughout. For the frequency of 40 Hz‚ the average current was found to be 0.634‚ the experimental magnetic field was found to be 29.21 Gauss while the average magnetic field calculated from the max and minimum values was 31.25 Gauss giving a percent error of 6.53%. V emf was calculated to be 0.03177V and the average
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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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