(i) The points at which the net magnetic field of the magnet and the earth becomes zero are called Neutral points. (ii) The point at which horizontal component of earth’s magnetic field balances the magnetic field due to the magnet is called Neutral Point. (iii) When pole of a magnet is along the north geographical pole: They lie along the equatorial line of the magnet. (iv) When South pole of a magnet is along the north geographical pole: They lie along the axial line. 13. Properties of Magnetic field lines: 01.Magnetic field lines are continuous and closed loops. 02.The tangent to line of force at any point gives the direction of the magnetic field. 03.They do not intersect each other. 04.They expand laterally and contract longitudinally. 14. Difference between electric field lines and magnetic field line: 01.Electric field lines do not exist within a conductor, but they exist in a magnet. 02.Electric field lines are discontinuous and magnetic field lines are continuous. 15. Classification of Magnetic substances: Ferromagnetic substances (ii) Para magnetic substances Dia magnetic substances Property Ferromagnetic Paramagnetic Diamagnetic Attractive nature Strongly Weekly Repelled attracted by attracted magnet Freely suspended When slowly Right angles suspended, to the quickly aligns magnetic the field direction of magnetic field Lines of force More line of less Harldly force except one line passing through its axis Permeability Much more More than 1 Less than 1 than 1 Magnetization(M) Large positive Small Negative positive Susceptibility(I/H) Large positive Small Negative positive law Obeys and Obey and Do not obey ferro to para para to dia
(i) The points at which the net magnetic field of the magnet and the earth becomes zero are called Neutral points. (ii) The point at which horizontal component of earth’s magnetic field balances the magnetic field due to the magnet is called Neutral Point. (iii) When pole of a magnet is along the north geographical pole: They lie along the equatorial line of the magnet. (iv) When South pole of a magnet is along the north geographical pole: They lie along the axial line. 13. Properties of Magnetic field lines: 01.Magnetic field lines are continuous and closed loops. 02.The tangent to line of force at any point gives the direction of the magnetic field. 03.They do not intersect each other. 04.They expand laterally and contract longitudinally. 14. Difference between electric field lines and magnetic field line: 01.Electric field lines do not exist within a conductor, but they exist in a magnet. 02.Electric field lines are discontinuous and magnetic field lines are continuous. 15. Classification of Magnetic substances: Ferromagnetic substances (ii) Para magnetic substances Dia magnetic substances Property Ferromagnetic Paramagnetic Diamagnetic Attractive nature Strongly attracted by magnet Weekly attracted Repelled Freely suspended When suspended, quickly aligns the direction of magnetic field slowly Right angles to the magnetic field Lines of force More line of force less Harldly except one line passing through its axis Permeability Much more than 1 More than 1 Less than 1 Magnetization(M) Large positive Small positive Negative Susceptibility(I/H) Large positive Small positive Negative law Obeys and ferro to para Obey and para to dia Do not obey