MAGNETIC EFFECT OF ELECTRIC CURRENT

 

 MAGNETIC EFFECT:-  The term magnetic effect of electric current means that or electric current flowing in a wire produces in a magnetic field around it. In other words, electric current can produce magnetism.

MAGNET:-  A magnet is an object which attract pieces of iron, steel, nickel and cobalt. Magnets come in various shapes and sizes depending on their in tended use.

BASIC  LAWS OF MAGNETISM:

1] There are two poles namely north pole and south pole.

2] Like poles repel each other, while unlike poles attract each other.

LODE STONE:- The black ore of iron (fe3o) called magnetic capable of attracting  similar pieces of iron is called lode stone.

MAGNETIC SUBSTANCE:-

Those substances which are attracted by magnet are called magnetic substances.

NON MAGNETIC SUBSTANCES:-

Those substances which are not attracted by a magnet are called non magnetic substances.

MAGNETIC FIELD:-

 The space surrounding a magnet in which magnetic force is exerted is called a magnetic field. The magnetic field has both, magnitude as well as direction.] A compass needle placed near a magnet gets deflected due to the magnetic force exerted by a magnet. The north end of the needle of a compass indicates the direction of magnetic field at a point where it is placed. [The S I unit of magnetic field is telsa.

 

MAGNETIC FIELD LINES:-

 A magnetic field is described by drawing the magnetic field lines. (The magnetic field lines are the lines drawn in a magnetic field along which a north magnetic pole would move.) The magnetic field lines are also known as magnetic lines of force. (The magnetic field lines always begin from N-pole of a magnet and end on the S-pole) of a magnet.

Properties of the magnetic field lines:-

(i)           The magnetic field lines originate from the north pole of a magnet and end at its South pole.

(ii)       The magnetic field lines come close to one another near the poles of a magnet but they are widely separated at other places.

(iii)    They exert lateral pressure on each other.

(iv)    They magnetic field lines do not intersect one another. It is because if they do so, it will give two different direction at the same point which is not possible.

 

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