Electromagnetic induction 10th class physics chapter 15 | electromagnetic induction in urdu hindi

Electromagnatic induction 10th class physics chapter 15 | electromagnetic induction in urdu hindi 15.5 ELECTROMAGNETIC INDUCTION Hans Christian Oersted and Ampere discovered that an electric current through a conductor produces a magnetic field around it. Michael Faraday thought that the reverse must also be true; that a magnetic field must produce an electric current. Faraday found that he could induce electric current by moving a wire through a magnetic field. In the same year, Joseph Henry also showed that a changing magnetic field could produce electric current. Now we shall discuss Faraday's experiments for the production of e.m.f. in magnetic field. The strength of magnetic field is defined as the number of magnetic lines of force passing through any surface. The number of lines of force is maximum when the surface is held perpendicular to the magnetic lines of force (Fig.15.10). It will be minimum when surface is held parallel to the magnetic lines of force (Fig.15.11). If we place a coil in the magnetic field of a bar magnet, some of the magnetic lines of force will pass through it. If the coil is far away from the magnet, only a few lines of force will pass through the coil (Fig.15.12-a). However, if the coil is close to the magnet, a large number of lines of force will pass through ifferent distances from the magnet This means, we can change the number of magnetic lines of force through a coil by moving it in the magnetic field. This change in the number of magnetic field lines will induce an e.m.f. in the coil. This is the basic principle of the production of electricity. Activity 15.2: Take a rectangular loop of wire and connect its two ends with a galvanometer. Now hold the wire stationary or move it parallel to the magnetic field of a strong U-shaped magnet. Galvanometer shows no deflection and hence there is no current. Now move the wire downward through the field, current is induced in one direction as shown by the deflection of the galvanometer (Fig. 15.13-a). Now move the wire upward through the field, current is induced in the opposite direction (Fig. 15.13-b). Fig. 15.13: Demonstration of electromagnetic induction by the movement of a wire loop in the magnet field It implies that an electric current is generated in a wire only when the wire cuts magnetic field lines. This induced current is generated by the induced e.m.f. in the Related searches 10th class physics chapter 15 electromagnetic induction 10th class physics electromagnetic induction Electromagnetic induction 10th physics 1. Electromagnetic induction 2. Electromagnetic induction sabaq 3. Electromagnetic induction ilmkidunya 4. Electromagnatic induction khan 5. Electromagnetic induction academy 6. Electromagnetic induction haytham 7. Electromagnetic induction 10 class physics 8. Electromagnetic induction physics Elctromagnatic induction in urdu 10. Electromagnatic induction in hindi 11. Electromagnetic induction 10th class physics chapter 15 16. Electromagnetic induction magnet 17. Electromagnetic induction brains 18. Electromagnetic induction grade 10 Previous videos 15.2 Force on a current carrying conductor placed in the magnetic field Related Searches:- 1. 10th physics chapter 15 force on a current carrying conductor placed in the magnetic field 2. 10 class physics ch 15 force on a current carrying conductor placed in the magnetic field 3. Force on a current carrying conductor placed in a magnetic field sabaq 4. Force on a current carrying conductor placed in a magnetic field khan 5. Force on a current carrying conductor placed in a magnetic field academy 6. Force on a current carrying conductor placed in a magnetic field magnet 7. Force on a current carrying conductor placed in a magnetic field brains 8. Force on a current carrying conductor placed in a magnetic field foundation 9. Force on a current carrying conductor placed in a magnetic field 10th physics 10. Force on a current carrying conductor placed in a magnetic field 10th class physics 11. Force on a current carrying conductor placed in a magnetic field 10th grade 12. Force on a current carrying conductor placed in a magnetic field class 10 13. Force on a current carrying conductor placed in a magnetic field grade 10 14. Force on a current carrying conductor placed in a magnetic field in urdu 15. Force on a current carrying conductor placed in a magnetic field in hindi