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Topic: Phasor (physics)

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	Phasor (physics) - Wikipedia, the free encyclopedia
		A phasor is a vector drawn to represent a wave, such that the vector sum of several phasors can be used to determine the intensity and phase of the several waves after interference.
		Phasors are most commonly used to visually solve problems of the type "several waves of similar frequency but different phases and amplitudes are interfered at a point, what is the resulting intensity?" To solve this problem, draw one phasor for each of the waves, and then simply perform vector addition on them.
		A phasor can be used to model the behavior of a particle in simple harmonic motion, in which case, the y value of the phasor corresponds to the particle's current displacement, and one should imagine the phasor rotating around the origin as the object oscillates.
	en.wikipedia.org /wiki/Phasor_(physics) (625 words)

	UNCW CAS: Department of Physics - Academic Programs
		Great Ideas in Physics (3) Introduces the nature of science to the nonscientist by emphasizing the concepts underlying four great ideas in physics: the conservation of energy, the second law of thermodynamics, the relativity of time, and the wave-particle duality of nature.
		An introduction to the mathematical techniques useful in physics: vector analysis, operator and matrix analysis; functions of a complex variable and calculus of residues; differential equations, special functions of mathematical physics; Fourier series and transforms, eigenfunctions and Sturm-Liouville equation; Green's functions; variational methods; and perturbation theory.
		Internship in Physics (1-3) Prerequisite: Overall GPA of at least 2.50 and a GPA in PHY courses of at least 2.80.
	www.uncwil.edu /phy/course_descriptions.html (863 words)

	PHASORS (Site not responding. Last check: 2007-11-05)
		6 in terms of phasor diagrams, but clearly the smooth curve shown there is not the result of an infinte number of geometrical constructions.
		Figure: Blowup of one of the isosceles triangles formed by a single phasor and two radii from the center of the circumscribed circle to the tip and tail of the phasor.
		(7) with calculus: the extrema (maxima and minima) of A occur at the physical angles
	musr.physics.ubc.ca /~jess/hr/skept/Phasors (874 words)

	Catalog
		Physics courses will help increase students’ scientific literacy and understanding of the physical world.
		All physics courses assume that the student has taken a college preparatory course in high school mathematics, typically including two years of algebra.
		PHYS 102 College Physics II Introduction to classical theories of mechanics, electromagnetism, and heat, as well as modern theories of special relativity, quantum mechanics, and the nucleus.
	cas.bellarmine.edu /physics/Catalogue.htm (430 words)

	Phasor - Wikipedia, the free encyclopedia
		Phasor (physics) - describes the phase of a particle in a simple harmonic motion or a wave motion.
		Phasor (electronics) - a quantity with magnitude and phase (which is measured with respect to a fixed reference).
		It is usually represented as a complex number.
	en.wikipedia.org /wiki/Phasor (107 words)

	AC Circuits
		The phasors are rotating at an angular speed of:
		Phasor diagrams are easier to draw than the sinusoidal curves, and are easier to use to calcite phase angles.
		The flux change is the same in both the primary coil and secondary coil.
	www.physics.sjsu.edu /becker/physics51/ac_circuits.htm (263 words)

	PHYS208 Phasor Animation (Site not responding. Last check: 2007-11-05)
		This animation is intended to show the relationship between the rotating phasor representing an ac voltage (or current) and the electrical signal that would be observed on an oscilloscope.
		Note: HRW uses the sine function to represent the time dependence of an ac quantity, thus the projection of the phasor onto the vertical axis.
		Most other texts use the cosine function, a more natural choice given the relationship between the complex phasor and the Argand diagram, where the projection onto the horizontal axis is the real part of a function.
	www.physics.udel.edu /~watson/phys208/phasor-slow.html (146 words)

	Physics Department
		It has a graphical "clickandset" phasor control for complex Fourier transform or inverse transform which may be used to set initial conditions of a mode or wave.
		HitIt:The Physics of Tennis (C++) Simulates the complex mechanics of a tennis ball in flight and its collision with a moving racquet.
		AvoidIt:The Physics of Avoided Two-Level Crossing (C++) Models the quantum dynamics of perturbed two-level atom or NMR spin-resonance subject to Stark effects or related changing external symmetry breaking fields.
	www.uark.edu /depts/physics/research/compsimu.html (1759 words)

	Wave Interference
		This live phasor addition can be compared to both intensity plots (gray scale and line) and to the numerical value of the relative intensity.
		A tutorial section on wave motion and phasors, adding two waves, and path difference effects is included.
		Physics Academic Software publishes education software for the physics teaching community in cooperation with the American Institute of Physics, the American Physical Society, and the American Association of Physics Teacher.
	webassign.net /pasnew/wave_interference/wavein.html (310 words)

	Kinetic Books ® - Digital Physics Curriculum
		A new, comprehensive digital physics textbook enables students to experience physics as never before.
		Three levels of the introductory physics textbook are available.
		Kinetic Books' new digital physics curriculum including Virtual Physics Labs and 3 levels of the textbook are for sale.
	www.kineticbooks.com (274 words)

	19 (Site not responding. Last check: 2007-11-05)
		We discussed the arithmetic operations addition, subtraction, multiplication, division, powers and roots, in both the component and phasor representations.
		Addition and subtraction were simplest in the component representation, but do-able as vector addition and subtraction with phasors.
		All other operations were substantially simpler in the phasor representation, though we discussed how the messy arithmetic could be done in the component representation.
	www.physics.emory.edu /faculty/benson/320/notes/19/19.html (94 words)

	Tutor Bio: Phasor (Site not responding. Last check: 2007-11-05)
		Phasor attended Mount Allison University in New Brunswick to complete a Bachelor of Science degree, majoring in Biochemistry and minoring in English.
		Phasor played in a symphonic band throughout school and into the third year of university.
		This is Phasor's second year with Ask a Teacher.
	www.ilc.org /AAT/AboutAAT/TutorsBios/aat_Phasor.html (123 words)

	Interf Applets
		Now draw phasors that will help explain why a single slit or 4 slits acts as they do.
		Enter 0 in the first box, then click "Draw Phasor." Three phasors will appear, rotated by 10° from each other, along with the phasor sum (in blue).
		The phasors represent the amplitudes of the waves, with each slit contributing an amplitude of 1.
	www.rit.edu /~agysps/courses/312_043web/cl_wkshts/res_Nslit_phasors.htm (557 words)

	Quantum Mechanics: See It Now
		However, in the phasor representation it is clear that an up-arrow summed with an equal down-arrow should give zero, whereas in color-for-phase it is not obvious that green summed with maroon should give darkness.
		One possibility is to draw phasors at representative points on the two-variable plane.
		Games have proven to be effective in teaching various aspects of physics (see references from diSessa to Dugdale and Kibbey) because a well thought-out and entertaining game captivates student interest and results in students spending more time and more effective time on learning the subject.
	www.oberlin.edu /physics/dstyer/TeachQM/see.html (2525 words)

	Phasor Phactory
		This expression also can be written as the real part of a phasor sum
		Since projection on the real (horizontal) axis is inconvenient for portrayal, we rotate each phasor by
		In the applet there are four options for displaying a Fourier series with up to 25 terms:
	www.jhu.edu /~signals/phasorapplet2/phasorappletindex.htm (98 words)

	Yale Applied Physics- Undergrad courses
		The elementary physics of semiconductors; two-terminal devices, i.e., p-n junction diodes, including leds and lasers, and Schottky diodes; three-terminal devices, i.e., bipolar transistors and FETs; and selected topics such as metal contacts and device fabrication.
		Topics include contemporary compound semiconductor material properties and epitaxial growth techniques; high-speed analog and digital devices; microwave and millimeter wave devices for radar and wireless communications; the physics and device properties of quantum wells and superlattices; hemts and modulation-doped structures; resonant tunneling physics and devices; and device modeling using computer simulation tools.
		Intended for upperclassmen in the physical sciences with an interest in electron device physics and applications.
	www.yale.edu /engtest/aphy/course_listings.html (868 words)

	Simple AC circuits (Site not responding. Last check: 2007-11-05)
		In addition there are meters for the voltage U (blue) and the amperage I (red).
		Below the drawing of the circuit you see on the left a phasor diagram; it is possible to read the momentary oscillation phases from the position of the two phasors (voltage blue, amperage red).
		The projection of a phasor onto the horizontal axis corresponds to the momentary value of U respectively I. On the bottom right the dependence of voltage and amperage on the time is illustrated in a diagram.
	www.physics.uoguelph.ca /Fendt_app/phe/accircuit.htm (184 words)

	K7-46.HTML (Site not responding. Last check: 2007-11-05)
		PURPOSE: To demonstrate "phasor" rotations and phasor addition.
		Draw the phase relations then rotate the model to represent the applied alternating voltage.
		It is also useful in adding light from a series of segments of a single slit, simple harmonic motion (single phasor), or the addition of two mechanical waves.
	www.physics.umd.edu /lecdem/services/demos/demosk7/k7-46.htm (66 words)

	PHY 9B Classical Physics Summer Session I 2006
		In the movies the red vectors represent the electric field at the screen due to one slit.
		This movie shows how the phasor diagram rotates with time due to the angular frequency of the electric field for a fix position at the screen, i.e., constant phase difference.
		Please arrive at the exam at LEAST 10 minutes before the exam so we may check student photo IDs as you enter the lecture theatre.
	www.physics.ucdavis.edu /classes/Physics9B-SS1 (482 words)

	maths: strange notation - Advanced Physics Forums
		Do a search on “angle notation” or “phasor notation,” and you’ll find out a lot about its usefulness in physics and engineering.
		Hmm, yes but phasor is usually written as ∠ ?
		Plus that a phasor does not contain an imaginary number, because it's included in the sign itself: 1e^(ix) = ∠x; Consequently ∠(i+x) doesn't make much sense, does it ?
	www.advancedphysics.org /forum/showthread.php?t=5804 (202 words)

	Education/Interactive experiments/Mathematical and statistical physics resources - PhysicsWeb
		Bio Balance- The remarkable relationships between a physical balance and the molecular modeling of the drug-receptor response.
		Indeed, it is closely related to several simulation in Physics.
		It is intended mainly for undergraduate students in EE and Physics.
	physicsweb.org /resources/Education/Interactive_experiments/Mathematical_and_statistical_physics (969 words)

	NAB2006 - The World's Largest Electronic Media Show (Site not responding. Last check: 2007-11-05)
		One of the biggest challenges in radio will be the implementation of the AM-IBOC system with AM directional arrays.
		The traditional phasor, comprised of complex and often troublesome reactive networks, may not be adequate for the AM-IBOC system.
		One possible solution to the directional array issue is the Digital Phasor, a computer-based control system that eliminates the complex, reactive phasor networks.
	www.nabshow.com /Conferences/PaperDescription.asp?id=1203572 (78 words)

	UIUC Physics Lecture Demo: Kruse's AC Voltage Phasors (Site not responding. Last check: 2007-11-05)
		UIUC Physics Lecture Demo: Kruse's AC Voltage Phasors
		Kruse's computer program is used to demonstrate the phase relationship between the current and the voltage of an alternating current circuit, by using phasor diagrams.
		© Dept. of Physics, Univ. of Illinois at Urbana-Champaign, 1996.
	demo.physics.uiuc.edu /LectDemo/scripts/demo_descript.idc?DemoID=239 (51 words)

	Bohr Atom (Site not responding. Last check: 2007-11-05)
		This animation was coded at the University of St Andrews by Dr Aly Gillies.
		It shows the way that a rotating phasor can be used to describe the evolution of a vibration or wave.
		This is an exe file for use on a PC.
	www.st-andrews.ac.uk /~bds2/ltsn/sta/phasor.htm (55 words)

	DOS applications to be downloaded from packets
		Slider selects output angle and user can see if waves are in step at that angle.
		It shows grayscale patterns of 2-source interference and ties path difference (a bar graph shows how much path difference) to a phasor diagram, and to the grayscale plot.
		Problem statements for the wave interference simulation (21 problems).
	www.rose-hulman.edu /~moloney/DosDown.htm (603 words)

	UIUC Physics Lecture Demo: Phasor Wheel (Round Blackboard with Vectors) (via CobWeb/3.1 planetlab2.netlab.uky.edu) (Site not responding. Last check: 2007-11-05)
		UIUC Physics Lecture Demo: Phasor Wheel (Round Blackboard with Vectors) (via CobWeb/3.1 planetlab2.netlab.uky.edu)
		Magnetic arrows are placed on a round flboard, which is hung vertically and then spun.
		The demonstration takes about 1 minute to perform.
	demo.physics.uiuc.edu.cob-web.org:8888 /LectDemo/scripts/demo_descript.idc?DemoID=320 (66 words)

	Physics&Astronomy at St Andrews
		These courses take advantage of Flash animations to enhance learning and develop key concepts.
		The phasor animation below is one such example; here, the polarisation state through a birefringent plate is "mapped" to a phasor diagram.
		The example shows a half-wave plate, what sort of plate would you have if only half the thickness were used in the z-direction?
	www.st-andrews.ac.uk /physics/Flash_Files/Phasor.php (115 words)

	Dolmetsch Online - Physics of Musical Instruments - Combining Vibrations
		We have shown these in the diagram below as two phasors, each rotating, in the complex plane in an anti-clockwise direction with angular velocity
		The pale blue and purple lines are the position phasors as they would be represented individually.
		To add two phasors, one places the tail of one phasor A
	www.dolmetsch.com /poshistory3.htm (789 words)

	Physics Zone: Lessons on Electricity
		This lesson contains a simulation that allows you to see the difference both conceptually and mathematically between an AC circuit with a resistor, capacitor, or an inductor.
		The simulation plots the current and voltage on a graph and a phasor diagram.
		A collection of multiple choice questions providing immediate feedback.
	www.sciencejoywagon.com /physicszone/lesson/07electr.htm (217 words)

	converting phasor form to real time form
		17 Nov 2004 0:28 converting phasor form to real time form
		I need help converting the following two phasor eqns into real time forms.
		if u wanna convert a phasor form into real time form u multiply it with e^jwt
	www.edaboard.com /ftopic97445.html (152 words)

	Demonstration of PHYSics appLETS (PHYSLETS)
		Three Charges walked onto an axis - The Final Cut...
		AC - RLC Series circuits - watching evolution of time series from phasors [rlc]
		AC - RLC2 - observing changes in voltage graphs based on changes in initial variables [rlc2]
	qbx6.ltu.edu /s_schneider/physlets/main/index.shtml (732 words)

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