ประกอบการบรรยาย

2. Resistor

3. Resistor

4. Resistor

5. LDR
Light Dependent
Resistor
LDR

6. Thermister

7. Diode

8. Electric Resistivity

9. Electromotive
Force
(Electromotive Force : emf)

10. Electromotive
Force
(Electromotive Force : emf)
E (J/C)

11. Electromotive
Force
(Potential Differance : V)

12. Electromotive
Force
(Conservation of Energy)

13. Electromotive
Force
QE = QVR + QVr
E= VR + Vr
E= IR + Ir
 V= E - Ir

14. Electric Energy
W = QV
Q = It
V = IR

15. Electric Energy
W = IVt
W = I2Rt

16. Electric Energy
Electric Power : P

17. Electric Energy

18. Resistor Circuit
2

19. Batteries Circuit
2

20. Analysis Circuit
6
V OC  V in
12   6 
6
V OC  ( 30 V )
12   6 

21. Analysis Circuit
iSC a-b
a
b
RTh
6 // 1
Vx  V in
12  ( 6 // 1)
a-b
Vx
RTh = 1  + 6 //12 = 5  i SC 
1

22. Electric
Meter
Galvanometer

23. Ammeter
Shunt

24. Ammeter
V s  VG
I G RG
Rs 
Is
I G RG
Rs 
I  IG

25. Voltmeter
Multiplier

26. Voltmeter
V  VG  V m )
V  I G ( RG  R m )
V
Rm   RG
IG

27. Ohmtmeter

28. Ohmtmeter
x y
E
I 
RG  R0  r
Rx
x y
E
I 
( RG  R0  r )  R x

29. Electric
Energy
W  ItV  I Rt
2
= x

30. Electric
Current