ANSWAgeR: Yardsetersagnetic flux try well-defined: ?

_M???B·dA, the area integral of the magnetic field. If the integral is over a closed surface, the flux is zero; this is the famous situation which tells you that there are no point sources (called magnetic monopoles) of magnetic fields like there are for electric fields. If you like, you may interpret this as a number, but that is not really fundamental. If you talk about uniform magnetic fields which are perpendicular to a plane surface, ?_M=BA , is the flux through an area A. Then, if you interpret ?_M as a number, you would simply say, for example, there were 10 lines through an area of 1 m 2 if the magnetic field is 10 T. _E???E · dA . This is perhaps a little easier to understand because you can have point charges. For example, if you have a 1 C point charge, the electric field 1 m from it is E=Q/(4 ??₀r 2 )=1/(4×3.14×8.85×10 -12 x1 2 )=9.27×10 9 N/C. The flux at a distance of 1 m from the charge would therefore be ?_E =EA= 9.27×10 9 x4x3.14x 1 2 =1.17×10 11 Nm 2 /C. Incidentally, this is the flux regardless of where you measure it because the area of the sphere (4 ?r 2 ) surrounding the point charge appears both in the denominator of the field and in the numerator of the flux and cancels. Hence, you could say that there were 1.17×10 11 lines of electric field emanating from a 1 C point charge. You can see this from Gauss’s law, ?_E=??E · dA=Q/?₀ if the integration is over a closed surface enclosing the charge Q.

QUESTION: Perform long lasting magnets has actually a digital current surrounding them? Permanent magnets appears to have additional features so you’re able to electromagnets, such that electromagnets are used for induction and energy import when the good conductor is put inside their changing magnetized job. Therefore i just remember that , a keen electromagnet will have a switching magnetized community, which often generates a switching electronic newest for the a beneficial conductor placed contained in this magnetic job. My question is, perform permamant magnets make so it same household current if a beneficial conductor is placed within magnetized profession? We.elizabeth. easily had an effective long lasting magnet, perform We be able to make a recently available inside the a great coil if this is delivered with the permananet magnet’s magnetized field?

You can inquire a comparable concern on the electronic flux, ?

These are not currents you could actually connect an ammeter to and measure. If you are interested, there are, in general, two types of bound current, bound volume current density J_b and bound surface current density K_b. If the magnetization of the material is M, you can write J_b=curlM and K_b=Mxn where n is a unit vector normal to the surface and pointing out of the volume. I do not understand any of your rambling about induction. I will simply say that any changing magnetic field can induce currents and a permanent magnet is a source of a magnetic field; moving that magnet, through a wire ring, for example, will induce a current in the ring.

QUESTION: The thing that makes the guidelines off magnetic profession traces beyond your magnetic away from north to help you South and not Southern area in order to North? Is-it a discussion otherwise ‘s got a logic trailing they?

ANSWER: A long-term magnet can be regarded as with “bound” currents

ANSWER: It is just due to the fact random because whether a beneficial electrons try bad otherwise confident or whether an electric occupation items on the otherwise out of a bad charge. For people who find the different assistance out-of antique, you would need to have fun with a left hand rule to decide new push into a confident charges swinging through Video dating sites a charismatic occupation.