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: Would permanent magnets provides an electric newest related them? Long lasting magnets seemingly have more attributes to electromagnets, in a way that electromagnets can be used for induction and effort transfer if the good conductor is put in their modifying magnetic job. So i just remember that , a keen electromagnet gets a modifying magnetized community, which in turn makes a modifying electronic most recent within the an excellent conductor place within this magnetized job. My personal question is, create permamant magnets create it same electric energy if a beneficial conductor is placed within their magnetic job? I.elizabeth. if i got a robust permanent magnet, would We have the ability to build a recent for the a coil whether it is actually delivered with the permananet magnet’s magnetic profession?
You could ask a similar concern on the electric 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 Jb and bound surface current density Kb. If the magnetization of the material is M, you can write Jb=curlM and Kb=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: What makes the fresh direction out-of magnetic occupation lines outside of the magnet regarding northern to help you Southern area rather than Southern area so you’re able to North? Will it be a seminar or has got a reasoning trailing it?
ANSWER: A long-term magnet dating a Video is generally looked at as having „bound“ currents
ANSWER: It is just since arbitrary once the whether or not a electrons are negative otherwise positive otherwise whether or not an electric profession factors for the otherwise aside away from a poor fees. If you chose the more guidelines out of antique, you would need to explore a left hand rule to choose new force to your a positive costs moving owing to a charismatic profession.