1. Magnetic fields in current carrying conductor (straight wire) I A B

3. Class exercise(P.209#4(a)(i)) I

4. Magnetic fields in current carrying conductor(solenoid) Solenoid 螺線管 AB

5. Class exercise(P.213#12)

6. Motor-rule

7. +

9. Class exercise(P.212#10)

10. Class exercise(P.210#5)

11. Class exercise(P.210#6)

12. Class exercise(P.210#7)

13. Motor

15. In which direction does the coil rotate? example

16. The coil rotates in the clockwise direction as seen by the observer.

17. What will you observe when switch S 1 / S 2 is closed?

18. Moving coil galvanometer Circular magnet

20. Shunt ( 分流器 ) Shunt

21. Shunt ( 分流器 ) Shunt IIGIG ISIS I = I G + I S RGRG RSRS

22. Shunt ( 分流器 ) Shunt IIGIG ISIS RGRG RSRS I G R G = I S R S

23. Shunt ( 分流器 ) example Shunt 5 A 1 mA ISIS 100  RSRS Step 2: Use I G R G = I S R S to find R S Step 1: Find I S

24. Multiplier ( 倍加器 ) Multiplier

25. Multiplier ( 倍加器 ) Multiplier V IGIG VGVG VMVM RGRG RMRM

26. Multiplier ( 倍加器 ) example Multiplier 5 V 100  A VGVG VMVM 1000  RMRM

27. Multiplier

28. Application

30. I I

31. Miscellaneous