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The field lines have no start or stop. They form closed loops and can never cross. The field lines are found inside and outside the magnet. From the point of view looking from inside the magnet the field lines appear to be (say) S to N, while outside the lines appear to be N to S. ( you could choose the opposite convention)
+-->---| S inside -->--------- N | --- outside-->-+
+-----------<-----------<-----------<---------------<-+
Wiki User
∙ 12y ago
Wiki User
∙ 11y agoClosed Lines
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Should common nouns always be capitalized?
Only if they are at the start of a sentence. Otherwise they are not capitalised.
Why should you always start with low power when using a microscope?
You don't have to its just to see the different cycles.
Why does a magnet loses its magnetism when it is strongly heated or hammered?
A magnet is an alignment of particles in a solid. You can imagine a magnet as a bunch of tiny magnets that are all pointing in the same direction. When they point in the same direction, the little parts add up, and the magnet works like you'd expect. When you heat or hammer a magnet, the little magnetic parts can get jostled and unaligned. When that alignment is disturbed, they no longer point in the same direction and may even cancel other magnetic parts out, weakening and eventualy destroying the magnetism.
What two types of microphone patterns do you need for an ms technique?
For the side signal S you need always a figure-of-eight microphone. For the midle signal M you can choose what you want. Start with a cardioid.
What happens when the current in an electromagnet is turned on?
Many permanent magnets are based on iron compounds, so are conductive. Why they are magnets, the iron neuclei are individually magnetic and align through something called the Exchange interaction, which allows a closer approach of the nuclei than less comples inter atomic interactions. (just some properties of magnetic materials) The individual iron atoms group into regions called domains, these (in iron compounds) tend to also align, giving a reasonably good permanent magnetic nature for the bar of iron compound. So the individual; magnetic moment of the iron atoms are grouped into an overall alignment in the bar, leading to the permanent bar magnetic property. OK we have a (for example) rod if iron compound that is a bar magnet. If we put a current through it, it may play with the exchange interaction, disaligning the individual domains, reducing the overall magnetic flux intensity of the bar magnet. The current will develop an additional magnetic field which will spiral around the (assumed) length wise orientation of the bar magnet. This will create a superposition of the magnetic flux intensities, and likely work to disrupt the orientations of the magnetic domains within the barmagnet. So two effects, a possible change in the permanent magnetic flux intensity of the bar magnet and a generation of a secondary magnetic flux intensity which will be detectable as a spiral field around the metal object
An electric field has?
An electric field has both magnitude and direction and can be represented by lines of force, or field lines, that start on positive charges and terminate on negative charges.
Do electric field lines always form closed loops?
yes because they start from the positive charge and ends at the negative charge so closed path
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Among the field lines generated by a circle current, the one which passes the center is not closed. --JF Hu
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They start from one pole and terminate at the other end.
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Basically, the runners start as a crowd, not as individuals in lanes with starting blocks. Everybody lines up at the start, and they are all released at once.
Which is true of magnetic field lines but not electric field lines?
they show wich way iron shavings would align themselves They always make closed loops. Electric field lines can either form closed loops or they can start and finish on isolated electric charges. Magnetic field lines always only form closed loops.
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always have it builds tension this way.
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Magnets as such were not invented. Natural occurring mineral like Magnetite are magnetic. We have since approx 1730 been able to artificially make magnets. These days we can design a magnet to almost any shape and also give it a "charge" of almost any pattern we like. Magnets are still in the area of experimenting and inventions still happen in this field. Scientists these days search for a method in order to make a monopole.
Do electric and magnetic fields always form closed loops?
Magnetic fields do, because there's no such thing as an isolated magnetic "pole", and a magnetic line always starts and ends at opposite poles of the same magnetized object. But electric fields don't. You can easily have a bundle of isolated positive charge over here and a bundle of isolated negative charge over there, whereupon the lines of the electric field start on one bundle and end on the other bundle. But electric field lines can also exist in closed loops, and they do that in radio waves, where the electromagnetic field propagates with an electric field component and a magnetic field component, and they both form closed loops.
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If there was no curve to start on not everyone would be running the same distance. The curve has different starting lines on each lane to make sure this is evened out.
Why does magnets have poles?
All magnets no matter how small have two opposing poles, a north pole and a south pole. The Earth also has a magnetic field and so it too has two poles, a North and a South Pole. The Earth also spins on its axis, the ends of this axis are also called Poles. There are two ends, a North and a South pole which are close to but not exactly in the same positions as the Earth's two magnetic poles.
When do you start noticing a betta is pregnant?
a female Betta is always pregnant!! But u will start to notice vertical lines on its body like this!!!!!!!!!! not like this ---------. if they are horizontal then your fish is stressed out
