1. ELECTRIC CURRENT A flow of charge from one place to another. The unit is Ampere , which equal to a flow of 1 coulomb per second.

7. continuation: - - - - - - t = t 0 t = t 0 + 1 s plane plane

11. continuation: I 0 I 1 I 2 I 0 = I 1 + I 2

20. ELECTRIC RESISTANCE

32. Current Potential Difference graph of a 1000 W resistor , an Ohmic device. -4 -2 0 +2 +4 -2 +2 0 Current (mA) Potential Difference (V)

33. Current vs Potential Difference graph of a pn junction diode , a non-ohmic device. -4 -2 0 +2 +4 -2 +2 0 Current (mA) Potential Difference (V)

41. Resistors in Single Loop Circuit

43. Equivalent resistance in a Series Circuit

46. Equivalent resistance in a Parallel Circuit

49. POWER IN CIRCUITS

56. What happen when one component in a series circuit was cut-off?

57. What happen when one component in a multiloop circuit was cut-off?

63. RC CIRCUIT (Resistor and Capacitor in a circuit)

65. Charging a capacitor R + - C S 1 S 2 ε + - I I I I I closed open Where: V R = Potential difference across the resistor. V C = Potential difference across the capacitor. I