(vi) Ion-induced dipole interactions [20(b)] In these interactions ion’s field induces a dipole moment in a molecule. If μ is the induced moment in a field E‚ ‘α’ is the polarizability (assumed to be constant)‚ then (26) (27) where FZ is the instantaneous force on the induced dipole (R >> δ) and the interaction energy at a given R‚ is (28) As the induced dipole is parallel to the field
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A superconductor is a metallic alloy that conducts electricity without resistance‚ below a certain temperature. Once in motion‚ an electrical current will flow in a closed loop within a superconducting material. This is the closest to scientists of a perpetual motion machine. In 1911‚ Heike Kamerlingh Onnes first observed superconductivity. He used mercury and cooled to four degrees Kelvin. When the mercury reached that temperature‚ the resistance disappeared. That meant that the electrical current
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Unit7 Assignment 1 #1 transmission lines are specialized cables and other media designed to carry alternating current and electromagnetic waves of high frequency (radio frequency or higher)‚ high enough that its wave nature must be taken into account. #3 Solid dielectric cable has become the national standard for underground electric transmission lines less than 200 kV. There is less maintenance with the solid cable‚ but impending insulation failures are much more difficult to monitor and detect
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Test EEPB463‚ Semester 1 2012/2013 COLLEGE OF ENGINEERING PUTRAJAYA CAMPUS TEST SEMESTER 1 2012 / 2013 PROGRAMME : B. Eng Electrical Power (Honours) SUBJECT CODE : EEPB463 SUBJECT : High Voltage Technology DATE : 11 July 2012 TIME : 12.15 pm – 1.15 pm (1 hour) Name: Q1 Q2 ID No.: Q3 Section: Total INSTRUCTIONS TO CANDIDATES: 1. This paper contains THREE (3) questions in SEVEN (7) pages. 2. Answer all questions. 3. Write all answers
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ACTI VE M AGNETI C BEARI NGS (AM B) A magnetic bearing is a bearing which supports a load using magnetic levitation. Magnetic bearings support moving machinery without physical contact‚ for example‚ they can levitate a rotating shaft and permit relative motion without friction or wear. In active magnetic bearings (AMB) a stable equilibrium is achieved by means of one or more control loops. The use of control loop for maintaining the gap between the shaft and bearing differentiate the active
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Although some physical issues appear to be difficult to understand‚ explain James Kakalios achieved from conduction and convection to modern physics. It is much easier to learn when it comes to something you love‚ that’s why the lessons presented in the book seemed understandable. One of the first issues of the second half of the work are phase transitions. Reading the title of the section I figured it would be a very complicated and it would take me a long time to know the subject. I realized‚ the
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Unit 51: Electrical Technology P1 describe the characteristics and principles of operation of a DC electromagnetic generator. A DC electromagnetic generator produces direct power and also‚ electrical power (just like the AC generator). It is also produced based on same fundamental principle of Faraday’s Law of Electromagnetic induction where whenever a conductor cuts magnetic flux‚ dynamically induced electromotive force is produced‚ and this causes current to flow if the conductor/conductors is
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51. --------- extends the range of a moving-iron ac ammeter. C a. A shunt b. A multiplier c. Changing number of turns of operating coil d. A series 52. The most sensitive instrument is D a. Moving-iron b. Dynamometer c. Hot-wire d. Permanent-magnet moving coil BRIDGE MEASUREMENT 53. The bridge uses the -------- measurement and operates on ------------- principle. C a. Direct measurement and null indication b. indirect Direct measurement and null indication c. Comparison measurement and null
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Ohm’s Law & Power Practice Problems . 1. A toaster oven is plugged into an outlet that provides a voltage difference of 120 V. What power does the oven use if the current is 10A? Show work: Answer ________________ 2. A VCR that is not playing still uses 10.0 W of power. What is the current if the VCR is plugged into a 120 V electric outlet? Show work: Answer ________________ 3. A flashlight bulb uses 2.4 W of power when the current in the bulb is 0.8 A. What is the voltage
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For our project we decided to disassemble and understand a Memphis 1 Channel Mono Block Amplifier. First we started by disassembling the amp down to the main circuit board. From there we assigned ourselves different components to understand what they were and how they worked inside the amp. We all researched our components and got back together to discuss and figure out the flow of power and operations of the amp worked. A general idea of what the amp does is as follows. Power comes into the inputs
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