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Magnetic force on currents

F. F. P.62. Magnetic force on currents. N. N. I. I. S. S. P.62. Fleming’s left-hand rule. P.62. Magnetic field becomes stronger on the top. Neutral point. Magnetic field becomes smaller at the bottom. P.62. To have greater induced magnetic force:. Increase current.

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Magnetic force on currents

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  1. F F P.62 Magnetic force on currents N N I I S S

  2. P.62 Fleming’s left-hand rule

  3. P.62 Magnetic field becomes stronger on the top Neutral point Magnetic field becomes smaller at the bottom

  4. P.62 To have greater induced magnetic force: Increase current Stronger magnetic field

  5. P.63

  6. I N S N S P.63

  7. F F P.63 Conducting wire with a permanent magnet N N I I S S

  8. F F x x x x x I I x x x x x F F . . . . . . . . . . x x x x x . . . . . . . . . . I I x x x x x P.62

  9. P.63

  10. . x . x . F1 x I1 I2 P.63

  11. . x . x . F2 x I1 I2 P.63

  12. . x . x . F1 x I1 I2 P.63

  13. . x . x . F2 x I1 I2 P.63

  14. P.63 Attractive force Repulsive force

  15. P.63

  16. P.63 N N F F v v I S S

  17. P.63 Aurora

  18. P.64

  19. P.64 The rod moves to LHS.

  20. P.64 The rod moves to RHS.

  21. P.64 No current on metal rod. The rod remains at rest.

  22. P.65 X : North, Y : South Out of the paper More magnetic field lines The force is reversed in direction No change in direction

  23. P.65

  24. P.62

  25. P.66

  26. P.66

  27. P.66

  28. P.66 0 0 0 Anticlockwise 0 0 0 Clockwise

  29. F -F P.67 A couple is formed D.c. motor Commutator rotates with the coil

  30. P.67 Current flows from A to B

  31. P.67

  32. P.68 Use a stronger magnet Use larger current Motor can be more powerful Increase number of turns per unit length of coil Use soft-iron core

  33. . F . x -F x P.68 Couple is constant

  34. . . N S . x x x P.68 Large number of turns of wire Several coils Soft-iron core Increase power & run more smoothly

  35. Sound wave P.68 Loudspeaker

  36. P.68 Solenoid Circular magnet Paper cone

  37. N N N S N N N N N P.68

  38. P.68

  39. P.70

  40. P.70

  41. P.71

  42. P.71

  43. P.71

  44. P.71

  45. P.71

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