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Topic: Amperes Law

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	Ampere - Wikipedia, the free encyclopedia
		The ampere is defined first (it is a base unit, along with the metre, the second, and the gram), without reference to the quantity of charge.
		The unit of charge, the coulomb, is defined to be the amount of charge displaced by a one ampere current in the time of one second.
		The unit of electric charge, the coulomb, is defined in terms of the ampere: one coulomb is the amount of electric charge (formerly quantity of electricity) carried in a current of one ampere flowing for one second.
	en.wikipedia.org /wiki/Ampere (705 words)

	Ampère's law - Wikipedia, the free encyclopedia
		In physics, Ampère's law, discovered by André-Marie Ampère, relates the circulating magnetic field in a closed loop to the electric current passing through the loop.
		It is the magnetic equivalent of Faraday's law of induction,
		To resolve the problem, he came up with the concept of displacement current and made a generalized version of Ampère's law which was incorporated into Maxwell's equations.
	en.wikipedia.org /wiki/Ampere's_law (389 words)

	Ampere
		Ampere was a very talented man who mastered all mathematics by the time he was twelve years old.
		He formulated a law of electromagnetism, known as Amperes law, which describes the magnetic force between two electric currents.
		Ampere was the first person to think of measuring techniques for electricity, the unit amps (A) is named after Ampere.
	dspace.dial.pipex.com /prod/dialspace/town/pipexdsl/q/aqtz91/bex/ampere.htm (124 words)

	Ohm's Law
		When a microscopic view of Ohm's law is taken, it is found to depend upon the fact that the drift velocity of charges through the material is proportional to the electric field in the conductor.
		The electric current in amperes which flows into any junction in an electric circuit is equal to the current which flows out.
		Along with the voltage law, this law is a powerful tool for the analysis of electric circuits.
	hyperphysics.phy-astr.gsu.edu /hbase/electric/ohmlaw.html (321 words)

	Assignment 2 (Site not responding. Last check: 2007-10-24)
		Ampere's law can be used to find the magnetic fields due to the coil and due to the wire.
		(a) Amperes law yields the magnetic field inside the torus due to a current I in the windings.
		(b) Amperes law yields the magnetic field inside the torus due to a current I in the wire.
	electron9.phys.utk.edu /phys514/assignments/h2s.htm (991 words)

	Ampere's Law, must the current extend to infinity?
		The method we use is: we construct a rectangular loop that one of the sides lies along the central of the solenoid, 1 side outside the solenoid and parallel to the previos one, and the remaining 2 sides connect the previos 2 sides and perpendicular to them.
		Ampere's law is valid (well, if you include the term added by Maxwell), no matter what.
		When a system is more complex and there is no obviosu symmetry, it is not that the law fails, it is rather than it is not very useful because it involves an integral very difficult to do.
	www.physicsforums.com /showthread.php?p=974949#post974949 (1259 words)

	Kirchhoff's Current Law (Site not responding. Last check: 2007-10-24)
		We are already familiar with Kirchhoff's current law from parallel circuits, that is, the sum of the branch currents is equal to the total current entering the branches, as well as the total current leaving the branches (Figure 35).
		Kirchhoff's voltage law states that the sum of the voltage drops around a closed loop is equal to the sum of the voltage sources of that loop.
		Kirchhoff's current law states that the current arriving at any junction point in a circuit is equal to the current leaving that junction.
	www.tpub.com /doeelecscience/electricalscience262.htm (295 words)

	No Title (Site not responding. Last check: 2007-10-24)
		To treat time varying fields, we are going to add another term to Ampere's law and we are going to introduce a new law called Faraday's law.
		The term which is added to Ampere's law was found by Maxwell in 1865.
		Therefor when the capacitor is charging, Amperes law would state that there is no enclosed current and hence the magnetic field is zero.
	www.pa.msu.edu /~duxbury/courses/phy294H/lectures/lecture23 (653 words)

	Ohm's Law for Electrical Circuits - Succeed in Physical Science
		Ohm's Law is the equation V = I * R and is used in both AC and DC circuits.
		The importance of Ohm's Law is that if you know the value two of the variables in the equation, you can then determine the third.
		Ohm's Law is the equation V = I * R that shows the relationship between voltage, current and resistance in a simple electrical circuit.
	www.school-for-champions.com /science/elect_ohms_law.htm (1104 words)

	Ohm's Law
		George Simon Ohm proved by experiment that there is a precise relationship between voltage, resistance, and current in a circuit.
		Ohm’s law is stated as: I = E / R
		Ohms law can be transposed to determine voltage when the resistance and current are known.
	www.wilsonware.com /electronics/ohm's_law.htm (418 words)

	Toroidal Magnetic Field
		Finding the magnetic field inside a toroid is a good example of the power of Ampere's law.
		The toroid is a useful device used in everything from tape heads to tokamaks.
		The sense of the magnetic field is that given by the right hand rule, and a more detailed visualization of the field of each loop can be obtained by examinine the field of a single current loop.
	hyperphysics.phy-astr.gsu.edu /hbase/magnetic/toroid.html (266 words)

	Bill Williams three
		LAW: Available voltage divided by the ohms in the circuit determines amperage.
		However, the layout is wired common rail; throttles trip their overload controls at less than one ampere; and all trains run with just one engine.
		Reduce either amperes or ohms in a path and you reduce the volts lost.
	home.earthlink.net /~campgus/bill.htm (5325 words)

	EcEn 360 Tutorials-Maxwell's Laws-Ampere's Law
		This lead Ampere to believe that the current was generating a magnetic field.
		Ampere's law states that a electric current produces a magnetic field in the direction your fingers point if you point your right hand thumb in the direction of the current flow.
		Point your right hand thumb in the direction the current is flowing and notice that the magnetic field flows in the direction that your fingers point.
	www.ee.byu.edu /ee/em/amplaw.htm (188 words)

	What is Ohm's Law? - a definition from Whatis.com - see also: George Simon Ohm
		Ohm's Law is the mathematical relationship among electric current, resistance, and voltage.
		Suppose a resistance having a value of R ohms carries a current of I amperes.
		Also, in a DC circuit, if E volts appear across a component that carries I amperes, then the resistance of that component is equal to E/I ohms.
	whatis.techtarget.com /definition/0,,sid9_gci212695,00.html (250 words)

	CMH Software - Ohm's Law
		Ohm's law basically states that the amount of current in a circuit varies directly with the voltage and varies inversely with the resistance
		Example #1, if you wish to find the watts (W) of a circuit and you know the voltage (E) is 12 volts and the amperage (I) is 4 amps substitute the numbers into the equation:
		Example #2, if you wish to find the amperage (I) of a circuit and you know the voltage (E) is 12 volts and the wattage (W) is 200 watts substitute the numbers into the equation:
	www.cmhsoftware.com /ohms.htm (93 words)

	Ohm's Law - a definition from Whatis.com - see also: George Simon Ohm
		- Ohm's Law is the mathematical relationship among electric current, resistance, and voltage.
		In direct-current (DC) circuits, Ohm's Law is simple and linear.
		If the units are other than ohms (for resistance), amperes (for current), and volts for voltage), then unit conversions should be made before calculations are done.
	searchsmb.techtarget.com /sDefinition/0,,sid44_gci212695,00.html (270 words)

	AMPERES LAW
		Equation (31.5) is correct for all points outside the wire, and can therefore be used to determine the magnetic field generated by wire 2, 3, 4, 5, and 6.
		The field at the center of wire 1, due to the current flowing in wire 1, can be determined using Ampere's law, and is equal to zero.
		Therefore we conclude that the field lines in a solenoid must be parallel to the solenoid axis.
	teacher.nsrl.rochester.edu /phy122/Lecture_Notes/Chapter31/chapter31.html (2797 words)

	What is Ohm’s Law? - A Word Definition From the Webopedia Computer Dictionary
		Ohm’s Law can be stated as three mathematical equations, all derived from the same principle.
		In the following equations, V is voltage measured in volts, I is current measured in amperes and R is resistance measured in ohms:
		Typically, Ohm’s Law is only applied to DC circuits and not AC circuits.
	www.webopedia.com /TERM/O/Ohms_Law.html (193 words)

	P285Cbal
		This data is a validation that the force between the two conductors is proportional to the current squared, half of Ampere's Law.
		The slope of the lines you drew through your sets of data points vary with the equilibrium positions of the rods.
		Because of the laws of reflection, if the mirror moves through an angle ƒ, the image moves through an angle 2 ƒ.
	www-unix.oit.umass.edu /~tpapirio/LAB285/285curbl.htm (1232 words)

	Introduction to DC Circuits
		According to Ohm's law (Equation 1), current should increase proportionally to voltage for a constant resistance.
		Once, the circuit in Figure 4 was assembled, lamps B and C were very dim with respect to lamp A. This corresponds to the measured voltages across the lamps.
		Removing lamp A from the circuit opened the circuit and all of the lamps went out, but removing lamp B caused lamp C to become brighter, and the same for removing lamp C for B. To put Ohm's law to the test, the circuit in Figure 5 was assembled.
	www.thought.net /jason/phy252/exp01 (694 words)

	Current Flow and Ohm's Law
		Ohm's law is the most important, basic law of electricity.
		Values may be input into the dialog boxes, or the resistance and voltage may also be varied by moving the arrows in the applet.
		Current and voltage are shown as they would be displayed on an oscilloscope with the X-axis being time and the Y-axis being the amplitude of the current or voltage.
	www.ndt-ed.org /EducationResources/CommunityCollege/EddyCurrents/Physics/currentflow.htm (358 words)

	Electrical Formulas (Site not responding. Last check: 2007-10-24)
		One ampere is the current which one volt can send through a resistance of one ohm.
		Kilovolt Ampere - One kilovolt ampere - KVA - is equal to 1,000 volt amperes.
		Converting Ampere between Single Phase and 3 Phase Converting amperage between single phase (120, 240 and 480 Voltage) and three phase (240 and 480 Voltage).
	www.engineeringtoolbox.com /electrical-formulas-d_455.html (374 words)

	Dept. of Physics - Course Description
		Integrals of the second law, work-energy, impulse-momentum, conservation of energy and momentum, applications.
		The laws of thermodynamics, applications to engine cycles, Coulombs law and electrostatic fields.
		Properties of matter, solids -stress and strain, Hookes law, liquids -pressure, Archimedes principle, Bernoullis equation, viscosity, gases -ideal gases, elements of kinetic theory, phase transitions, transport processes in liquids and gases -Brownian motion, diffusion, migration, convection, Stokes law, Cunninghams correction to Stokes law.
	www.emu.edu.tr /english/academics/facultiesdepartments/artsscience/physics/coursedescription.htm (606 words)

	FOH Online (Site not responding. Last check: 2007-10-24)
		As an acknowledgement for James Watt’s work on steam engines and defining the amount of work (power), physicists have defined a standard unit of power as a “Watt,” instead of the previously used horsepower.
		Given that standard residential and commercial receptacles use 15 or 20 amperes, Watt’s Law would say that the circuits that feed the receptacles would then have either 1800 or 2400 watts in power availability.
		Watt’s Law applies to many items, and the challenge is to distribute the various pieces of sound system gear so they do not add up beyond circuit power availability (capacity), or a potential “overload” may occur, resulting in a circuit breaker tripping or fuse blowing.
	www.fohonline.com /issue?di=0305&fi=tech.txt (1420 words)

	Ohm's Law
		Ohm's law is the most basic and most useful electrical equation.
		Where E is voltage measured in volts, I is current measure in amperes (amps) and R is resistance measured in ohms.
		From this we can substitute Ohm's law for any values we don't know.
	www.caraudiohelp.com /ohms_law/ohms_law.htm (690 words)

	PHYSICS - SOCIOLOGY/ANTHROPOLOGY/SOCIAL WORK (Site not responding. Last check: 2007-10-24)
		Topics covered are Gauss Law, Amperes Law, Biots Law, Faradays Law, electric charges and their dynamics, capacitance, resistance inductance, etc. Offered fall semester only.
		A study of the background of current administrative models, of the functions served by rational execution of the laws, and of the political values and motivations of bureaucracies.
		Using law as an organizing theme, it examines how the law is applied in several policy areas such as family and childrens issues, health and mental health, civil rights, gay and lesbian issues, and issues affecting the disabled.
	www.sru.edu /pages/2175.asp (5685 words)

	Biot-Savart Law and Amperes Law
		These laws deal with the magnetic field caused by a current and the distance from the current, so they must really be the same law in different disguises.
		I, because you can circle around the wire in a path with radius R, so B is constant on that path, and the path length is 2p R. Now let us find B by Biot-Savart.
		Note that if we wanted the field due to a segment, this would change the limits and we would have the difference of two cosines.
	instruct.tri-c.cc.oh.us /fgram/web/biot.htm (339 words)

	Theoretical Physics (Physics Dept.) Syllabus 1994-5
		Gases; gas laws, kinetic theory, transport properties, PVT diagrams.
		Heat; thermometry, heat and energy, first law of thermodynamics.
		Conservation laws, including those for parity and symmetry.
	www.maths.tcd.ie /~boutall/pub/official/Physics/TPSyll.html (1860 words)

	PHYSICS (PHYS) Course Description
		Electrostatics, Gauss Law, determination of the electric field and electrostatic potential from charge distributions, integral and differential forms of Maxwells Equations, dielectric materials, polarization, conductivity and resistivity of materials, motion of charged particles in electric fields.
		Magnetostatics, further applications of integral and differential forms of Maxwells Equations, Amperes Law, Faradays Law, Lenzs Law, determination of the magnetic field from current distributions, from time-varying electric fields, magnetic materials.
		Topics include the laws of thermodynamics, ideal and non-ideal gases, the kinetic theory of gases, non-flow and steady flow processes, heat cycles and an introduction to statistical physics.
	www.tamiu.edu /course/phys.htm (1317 words)

	Electromagnetic Fields
		Static electric fields in vacuum : Coulombs law, electrostatic potential gradient, fields due to point, line surface and volume charges, electric dipoles and its field.
		Summary of the results in the form of Maxwells equations, modification of equations for time varying fields.
		Uniform plane waves in free space : Derivation of wave equation and its solution in its simplest form, concept of space and time variations, E,H, and the direction of wave propagation, Intrinsic impedance, sinusoidally time varying uniform plane waves in free space, phase constant, wavelength, phase velocity, classification of waves for communication.
	saumi.tripod.com /courses/emf.htm (184 words)

	Medical and Science Media - Physics Software and CD-ROM (Site not responding. Last check: 2007-10-24)
		Ideal Gas: The pressure, volume, temperature relationship for an ideal gas is investigated using a movable piston in a cylinder and a P-V diagram.
		Snell’s Law: The refraction of light and critical angle are explored.
		Newton’s 1st Law: By changing the speed and direction of a truck carrying an ice sheet, the inertia of a puck resting on theice is examined.
	www.msmedia.com.au /SCIENCE/SOFTWARE/Physics/PHYSICS_SOFT.shtml (2856 words)

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