Please give concept of Magnetic field around a wire or loop ?

Question

Please give concept of Magnetic field around a wire or loop ?

Answer 1

Magnetic field around a wire-

Charged particles when accelerated produces a magnetic field. But when the particles are at rest they produce only electric field. Current consists of charged particles called electrons which move in opposite direction as that of current. Due to the motion of the electrons in the straight conducting wire a magnetic field gets generated. Thus a current carrying wire produces a magnetic field. The direction of the magnetic field can be determined by right hand thumb rule. Curl your fingers around the straight conducting wire and stretch your thumb in the direction of current (not electrons). The the direction in which your fingers curl will give you the direction of the magneting field.



Magnetic field for a circular loop-

The same thing happens for a circular loop. Due to movement of electrons through it magnetic field gets generated. The only difference is that it is a a straight wire bend to form a circular coil. Here the direction of magnetic field can also be found out by right hand thumb rule, though just the opposite ruethis time. Curl your fingers of your right hand in the direction of the current through the circular coil and stretch your thumb. Then the direction in which the thumb points will be the direction of magnetic field. A circular xoil behaves like magnet with a north and a south pole. The side of the circular loop from which the magnetic field emerge (which you found out by right and thumb rule) is the north pole and the other side is the south pole, as magnetic field lines always emerges from north pole and enters through the south pole.



Hope this helps. Lots if love...

Answer 2

Examining the direction of the magnetic field produced by a current-carrying segment of wire shows that all parts of the loop contribute magnetic field in the same direction inside the loop.



Electric current in a circular loop creates a magnetic field which is more concentrated in the center of the loop than outside the loop. Stacking multiple loops concentrates the field even more into what is called a solenoid.

Answer 3

current carrying wires makes concentric circular magnetic field lines around the current carrying wire.

the direction of magnetic field lines is perpendicular to the direction of current, works on ampere circuital law.