Question

plese answer my question... physics class 10 chapter magnetic effect and current​

Answer 1

$\mathtt{\huge{\underline{\red{Answer:-}}}}$

➝ A magnetic line of force may be defined as the curve the tangent to which at any point gives the direction of the magnetic field at that point. It may also be defined as the path along uhich a unit north pole would tend to move if free to do so.

Properties of lines of force :-

★ Magnetic lines of force are closed curves which start in air from the N-pole and end at the S-poleand then return to the N-pole through the interior of the magnet.

★ The lines of force never cross each other. If theydo so, that would mean there are two directionsof the magnetic field at the point of intersection,which is impossible.

★ They start from and end on the surface of the magnet normally.

★ The lines of force have a tendency to contract lengthwise and expand sidewise. This explains attraction between unlike poles and repulsion. between like poles.

★ The relative closeness of the lines of force gives a measure of the strength of the magnetic field which is maximum at the poles.

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