Why do 2 wires with their currents in the same direction attract each other?
354996
Gee .. been a while.  If I remember correctly the magnetic field is perpendicular to the electrical field.  Thus around the two wires the magnetic fields move in the same direction and combine, producing a net attractive force.\n\nIf the currents go the opposite direction, the forces repel.\n\nSee the link below for a more detailed explanation and pictures:
173205
If you say that C is correct and I agree, this is because in the diagram you see that U is the positive end of the battery,  and thus at a higher potential. V is the negative end and thus less(zero). At W, the potential is same as V because there is no resistance(negligible) in the wire. \nAs R is directly proportional to resistance potential, thus X is at a higher potential. Then, Y is same as X, and Z is higher than Y because of the same reason.
1040867
Using 3 phase current, it is possible to get 3 times the energy down the same wire - so it is much more efficient.  Each phase is 120 degrees out from the others, so the signal looks kind of like braided hair, when one phase is at the peak, the other two are crossing at 70%, one going up the other going down.  Once we get the energy to where we want to use it, then we can tap off the different phases for single phase use. \n\nI forget about the delta and wye stuff, it's been a while. \n\nCheers!
180274
Because the flowing of electrical current causes a magnetic field to be created which interacts with the outer core windings of the generator.  The turning of the inner core creates an opposing magnetic field in the outer (eletric core) and they interact.
193357
The generator consists mainly of a coil of wire wound over an iron core.This wire is connected to an external circuit where the current produced is either stored in capacitors or used to run a particular device. When the axle of the wire is rotated, magnetic flux linked with the wire changes and hence, according to Faraday's law, an electomotive force(emf) is induced in the wire as it is placed in between magnets having different polarities. Slip rings are present to allow the flow of the alternating current produced into an external circuit.
356526
When we say a vector has direction we mean we assign it a positive or negative value relative to some coordinate system.\n\nWhile you may assign a direction to a current in a wire, it is not neccisarily fixed in a particular dimention.  Sign convention in a circuit depends on which terminal you start at.
343981
In two charged plates, other than between the plates (and the edge effects), are there any field line? \nYES! other field lines are between the outer sides of the plates(depending on the charges of the plates and the convention used for the direction of the flow). To prove this, just connect the outer sides of the plates by a wire through an amper meter and you will see the meter moving.\n\nWhy is the electric field constant everywhere in the space between parallel plates? \nThey are not unless the area of both plates is inifinte and that the two plates are parallel.  In this case, the 1) direction of the field is the same every where since by definition the plates are parallel and 2) the absolute value is constant.  If not, there will be a surface current and the current would make the entire electric field (its magnitude) to be constant over the entire surface.
941082
If you consider 2 nodes in a circuit, node A and node B, and you consider that node A has a higher potential than node B, then the current between A and B is 0.30 A, but the current between Node B and Node A is -0.30 A. See Kirchoff's laws.
151709
The reason that, for example, your socks are attracted to each other is that when rubbed together, especially in the prescence of thermal energy(laundry dryer), their electrons are transfered from one to the other and also to all your other clothes. This gives the different materials different charges and thus they would be attracted to each other. In the case that they both gain electrons the reason that they still attract is because the sock that gained more electrons will push away the other socks electrons leaving the positive charges and thus they are attracted to each other.
471231
If the bundle diameter is the same and the individual wires are round in cross-section, then obviously the area of wire metal in the cross section is less in the bundle than in the solid wire so the bundle has a higher resistance. But let's say you mean that the bundle is enough larger in diameter that the metal areas of both cross sections are equal as assumed by answer 2. Suppose there are N strands in the bundle and the solid wire has a resistance R. Then each strand's resistance is N*R. Contrary to answer 2 (if I am reading it correctly), it makes no difference if the individual wires are connected side-by-side or not, as long as they are connected together at each end. Connecting them thus in parallel makes the bundle's resistance equal to R. Since the strands are identical in resistance and therefore carry the same current, the voltage at any distance along one strand is exactly the same as at the same distance along any other strand. Connect them together at that point and what happens? No change in current flow because no change in voltage, and therefore no change in resistance.
974868
Assuming that the wires closest to the source are either before or after the parallel branches in the circuit -- current would be max there because there is only one route for it.
313639
Nothing.\nUnless they are connected to a power source...\nThen power is teransferred to the other.\nThe spark you see is the power jumping the last few microns to make the connection.
24264
Electric current flows between two points, if the points have different potentials. When a bird touches a wire, the bird will have the same potential as the wire.\n\nIf the bird reaches two wires at the same time, there can be different potentials, so the bird can be 'electrocuted'. That's why the wires need to be far enough from each other.\n\nIf somebody reaches the wire and the ground at the same time, there can also be different potentials... That's why the wires need to be far enough from the ground.
660380
It is called induction, and happens because by moving a magnet near a conductor coil, the magnetic field changes generate a potential between the conductor tips, you may also move the coil, while the magnet is fixed.\n\nAlso if you have a coil near a magnet, and you connect the coil to a power source, the magnet will move.... so that is the way the electric motor works, because when a current flows on any conductor, it generates a magnetic field around it..
1055209
The top answer is incorrect.  In both cases, the current woul go on infiniitely, because energy will keep on traveling, but the current will get weaker and weaker, because it will keep spreading aparty, until the ammount of current in negligeble.\n\nHope this helps.
57062
When u apply potential difference to 2 ends of conductors this free electrons being negatively charged get attracted towards + potential. This results inflow of current.
185952
a diode blocks current from flowing in a certain direction. current will flow from the non striped side to the striped side