1. Magnetism Magnetic field- A magnet creates a magnetic field in its vicinity.

2. Magnetism It represents the effect a magnet has on its surroundings.

3. Magnetism All magnetic fields arise from the motion of electric charge.

4. Magnetism Magnetic field lines can be used to represent magnetic fields. The closer the lines are together, the greater the magnitude of the vector

5. Figure 22-4 Magnetic Field Lines for a Bar Magnet

6. Magnetism A magnetic field is represented by the symbol

7. Magnetism The direction of a magnetic field at a given location is the direction in which the north pole of a compass points when it is placed in that location.

8. Magnetism A charged particle moving in a magnetic field will experience a force if it has a velocity component perpendicular to the magnetic field.

9. Magnetism

10. The Magnetic Force Right Hand Rule (RHR)

11. Magnetism

12. Figure 22-8 The Magnetic Force Right-Hand Rule

13. Figure 22-9 The Magnetic Force for Positive and Negative Charges

14. Conceptual Checkpoint 22-2 Which is the positive? Negative? Zero charge?

15. Magnetism Velocity selector. A device with both magnetic and electric fields present. Only charged particles moving with a certain speed will pass through undeflected.

16. Magnetism

17. Conceptual Checkpoint 22-3 Which direction should the magnetic field be to give zero force?

18. Magnetism A charged particle moving with a velocity perpendicular to a uniform magnetic field, will move in a circle.

19. Figure 22-11 The Electromagnetic Flowmeter

20. Magnetism

23. Figure 22-12 Circular Motion in a Magnetic Field

24. Example 22-3 Uranium Separation

25. Forces on a long straight current carrying wire in a magnetic field. Magnetism

26. Forces on a long straight current carrying wire in a magnetic field. Magnetism

27. A long straight current carrying wire has charges moving inside it. Magnetism

28. If it is placed in a magnetic field, it will experience a force Magnetism

31. Figure 22-15 The Magnetic Force on a Current-Carrying Wire

32. Direction of magnetic forces in a current carrying loop in a magnetic field. Magnetism

33. Figure 22-16 Magnetic Forces on a Current Loop

34. Example 22-5 Torque on a Coil

35. Magnetism

37. To calculate the magnitude and direction of the magnetic field in the vicinity of a long straight current carrying wire. Magnetism

38. Apply the magnetic field right hand rule. 1.Point your thumb in the direction of current flow. 2.Curl your fingers around the wire 3.They will point in the direction of the magnetic field. Magnetism

39. Figure 22-19 The Magnetic Field of a Current-Carrying Wire

40. Magnetism