What is your EM crankosity?
in [Relativity]
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From: Benj on 21 Sep 2009 20:22 Are you a Maxwell loon? How well do you understand Maxwell's equations? Ten easy questions to measure your kookosity: 1. An electromagnetic plane wave in free vacuum consists of a sinusoidal electric field and a sinusoidal magnetic field at right angles to it. These fields are delayed 90 degrees from one another such that energy oscillates between them in a manner similar to an LRC circuit where the energy oscillates back and forth between capacitor storage and inductor storage. (true, false?) 2. A magnetic field changing strength in time causes an electric field in space that is capable of producing currents in conductors. The process is called "induction" and is described by Faraday's Law. (true, false?) 3. If a conducting circuit that encloses an area under a uniform magnetic field that totally covers the loop is changed in shape to enclose a different amount of magnetic flux, an emf will always be induced in the circuit due to the changed amount of flux. (true, false?) 4. When instruments measuring E and B (electric and magnetic fields) that are stationary with respect to those fields are placed on a moving reference frame moving with constant velocity with respect to the fields, by relativity, the meters always show the same values regardless of the magnitude of the (constant) velocity of the frame so long as the velocity of the moving frame is much slower than the speed of light. (true, false?) 5. For a point charge moving with a non-relativistic constant velocity (not accelerating) past an observer, the electric field from that charge will be observed to be the same spherical distribution found in electrostatics for a non-moving charge. (true, false) 6. According to Maxwell's Equations a time-changing electric field as in a charging or discharging capacitor creates a displacement current through that capacitor and that displacement current creates a magnetic field just as if the capacitor were not there and a wire carrying the current was producing the field. (true, false?) 7. It can be shown that if a line charge segment is moving past you as an observer at some constant velocity, that not only does the apparent length of the segment change to the viewer, but by Lorentz contraction at relativistic speeds the actual length of the line charge segment changes as well. (true, false?) 8. It is well known through experiment and observations that electromagnetic waves as predicted by Maxwell's Equations form a spectrum depending on frequency that runs without other changes from low frequency radio waves, up through microwaves, on up to sub-millimeter waves, thence to Infrared light, then visible light, ultraviolet light and on up into X-rays and cosmic rays. (true. false) 9. All electromagnetic clocks slow by the same amount as their frame velocity reaches significant relativistic speeds leading to the conclusion that by relativity, a "dilatation" of time takes place that affects all electromagnetic events and even including biological ones. (true , false?) 10. Electromagnetic waves as described by Maxwell's Equations, propagate through the vacuum of empty space by relationships observed from those equations that a changing electric field creates a magnetic field and a changing magnetic field creates an electric field. These waves are unique in that they do not require a medium to propagate in. (true, false?) ======================= Hey, Uncle Al, this test's for you! Show us your stuff now so we won't have to call you "idiot"!
From: susan on 21 Sep 2009 20:37 "Benj" <bjacoby(a)iwaynet.net> wrote in message news:5e383309-0232-4441-9a7e-81e9c752d378(a)f10g2000vbf.googlegroups.com... > Are you a Maxwell loon? > How well do you understand Maxwell's equations? > Ten easy questions to measure your kookosity: > > 1. An electromagnetic plane wave in free vacuum consists of a > sinusoidal electric > field and a sinusoidal magnetic field at right angles to it. These > fields are delayed > 90 degrees from one another such that energy oscillates between them > in a > manner similar to an LRC circuit where the energy oscillates back and > forth > between capacitor storage and inductor storage. (true, false?) false - no R component in EM in free vacuum. > > 2. A magnetic field changing strength in time causes an electric field > in space that is > capable of producing currents in conductors. The process is called > "induction" > and is described by Faraday's Law. (true, false?) close, not exact > > 3. If a conducting circuit that encloses an area under a uniform > magnetic field that > totally covers the loop is changed in shape to enclose a different > amount of > magnetic flux, an emf will always be induced in the circuit due to the > changed > amount of flux. (true, false?) mostly true, as wire crosses lines of flux > > 4. When instruments measuring E and B (electric and magnetic fields) > that are > stationary with respect to those fields are placed on a moving > reference frame > moving with constant velocity with respect to the fields, by > relativity, the meters > always show the same values regardless of the magnitude of the > (constant) > velocity of the frame so long as the velocity of the moving frame is > much slower > than the speed of light. (true, false?) there is an error term. > > 5. For a point charge moving with a non-relativistic constant velocity > (not > accelerating) past an observer, the electric field from that charge > will be observed > to be the same spherical distribution found in electrostatics for a > non-moving > charge. (true, false) there is an error term > > 6. According to Maxwell's Equations a time-changing electric field as > in a charging > or discharging capacitor creates a displacement current through that > capacitor and > that displacement current creates a magnetic field just as if the > capacitor were not > there and a wire carrying the current was producing the field. (true, > false?) how can you discharge a capacitor with it not being there? > > 7. It can be shown that if a line charge segment is moving past you as > an observer at > some constant velocity, that not only does the apparent length of the > segment > change to the viewer, but by Lorentz contraction at relativistic > speeds the actual > length of the line charge segment changes as well. (true, false?) > trivial > 8. It is well known through experiment and observations that > electromagnetic waves > as predicted by Maxwell's Equations form a spectrum depending on > frequency > that runs without other changes from low frequency radio waves, up > through > microwaves, on up to sub-millimeter waves, thence to Infrared light, > then visible > light, ultraviolet light and on up into X-rays and cosmic rays. > (true. false) cosmic rays are various particals, not EM > > 9. All electromagnetic clocks slow by the same amount as their frame > velocity > reaches significant relativistic speeds leading to the conclusion that > by relativity, a > "dilatation" of time takes place that affects all electromagnetic > events and even > including biological ones. (true , false?) how can one clock effect all time? > > 10. Electromagnetic waves as described by Maxwell's Equations, > propagate through > the vacuum of empty space by relationships observed from those > equations that a > changing electric field creates a magnetic field and a changing > magnetic field > creates an electric field. These waves are unique in that they do not > require a > medium to propagate in. (true, false?) trivial, look at the equations. > > ======================= > > Hey, Uncle Al, this test's for you! Show us your stuff now so we > won't have to call you "idiot"!
From: doug on 21 Sep 2009 21:43 susan wrote: > "Benj" <bjacoby(a)iwaynet.net> wrote in message > news:5e383309-0232-4441-9a7e-81e9c752d378(a)f10g2000vbf.googlegroups.com... > >>Are you a Maxwell loon? >>How well do you understand Maxwell's equations? >>Ten easy questions to measure your kookosity: >> >>1. An electromagnetic plane wave in free vacuum consists of a >>sinusoidal electric >>field and a sinusoidal magnetic field at right angles to it. These >>fields are delayed >>90 degrees from one another such that energy oscillates between them >>in a >>manner similar to an LRC circuit where the energy oscillates back and >>forth >>between capacitor storage and inductor storage. (true, false?) > > > false - no R component in EM in free vacuum. > > >>2. A magnetic field changing strength in time causes an electric field >>in space that is >>capable of producing currents in conductors. The process is called >>"induction" >>and is described by Faraday's Law. (true, false?) > > > close, not exact > > >>3. If a conducting circuit that encloses an area under a uniform >>magnetic field that >>totally covers the loop is changed in shape to enclose a different >>amount of >>magnetic flux, an emf will always be induced in the circuit due to the >>changed >>amount of flux. (true, false?) > > > mostly true, as wire crosses lines of flux > > >>4. When instruments measuring E and B (electric and magnetic fields) >>that are >>stationary with respect to those fields are placed on a moving >>reference frame >>moving with constant velocity with respect to the fields, by >>relativity, the meters >>always show the same values regardless of the magnitude of the >>(constant) >>velocity of the frame so long as the velocity of the moving frame is >>much slower >>than the speed of light. (true, false?) > > > there is an error term. > > >>5. For a point charge moving with a non-relativistic constant velocity >>(not >>accelerating) past an observer, the electric field from that charge >>will be observed >>to be the same spherical distribution found in electrostatics for a >>non-moving >>charge. (true, false) > > > there is an error term > > > >>6. According to Maxwell's Equations a time-changing electric field as >>in a charging >>or discharging capacitor creates a displacement current through that >>capacitor and >>that displacement current creates a magnetic field just as if the >>capacitor were not >>there and a wire carrying the current was producing the field. (true, >>false?) > > > how can you discharge a capacitor with it not being there? > > > >>7. It can be shown that if a line charge segment is moving past you as >>an observer at >>some constant velocity, that not only does the apparent length of the >>segment >>change to the viewer, but by Lorentz contraction at relativistic >>speeds the actual >>length of the line charge segment changes as well. (true, false?) >> > > > trivial > > >>8. It is well known through experiment and observations that >>electromagnetic waves >>as predicted by Maxwell's Equations form a spectrum depending on >>frequency >>that runs without other changes from low frequency radio waves, up >>through >>microwaves, on up to sub-millimeter waves, thence to Infrared light, >>then visible >>light, ultraviolet light and on up into X-rays and cosmic rays. >>(true. false) > > > > cosmic rays are various particals, not EM > > >>9. All electromagnetic clocks slow by the same amount as their frame >>velocity >>reaches significant relativistic speeds leading to the conclusion that >>by relativity, a >>"dilatation" of time takes place that affects all electromagnetic >>events and even >>including biological ones. (true , false?) > > > how can one clock effect all time? > > >>10. Electromagnetic waves as described by Maxwell's Equations, >>propagate through >>the vacuum of empty space by relationships observed from those >>equations that a >>changing electric field creates a magnetic field and a changing >>magnetic field >>creates an electric field. These waves are unique in that they do not >>require a >>medium to propagate in. (true, false?) > > > trivial, look at the equations. Be careful, you are dealing with Benj. He is a crank with an agenda. He does not know any science but he thinks he do do clever things. He is also a fool. > > > > >>======================= >> >>Hey, Uncle Al, this test's for you! Show us your stuff now so we >>won't have to call you "idiot"! > > >
From: Benj on 21 Sep 2009 21:23 On Sep 21, 9:43 pm, doug <x...(a)xx.com> wrote: > Be careful, you are dealing with Benj. He is a crank with > an agenda. He does not know any science but he thinks > he do do clever things. He is also a fool. Valid warning, "Doug", but I notice that while you are calling everyone else stooopid is was Susan who actually provided her answers to the questions. You can't answer, let alone provide cites to support your answer because you know nothing. You are obviously an English major. Oh wait? "do do"? Maybe I'm wrong about the English part... Ah yes, POLITICAL SCIENCE! Yeah, that's it! Idiot.
From: doug on 21 Sep 2009 22:54
Benj wrote: > On Sep 21, 9:43 pm, doug <x...(a)xx.com> wrote: > > >>Be careful, you are dealing with Benj. He is a crank with >>an agenda. He does not know any science but he thinks >>he do do clever things. He is also a fool. > > > Valid warning, "Doug", but I notice that while you are calling > everyone else stooopid is was Susan who actually provided her answers > to the questions. You can't answer, let alone provide cites to support > your answer because you know nothing. You are obviously an English > major. Oh wait? "do do"? Maybe I'm wrong about the English part... Ah > yes, POLITICAL SCIENCE! Yeah, that's it! Idiot. See, benj tries to hide his ignorance of science. He hopes to bluster and keep people from noticing he is completely ignoranct of science. Benj is a fool. > > > |