1. 2011 년 10 월 28 일 제 7 장

2.  Electric charge  Electric force and Coulomb’s law  Electric Currents-Superconductivity  Electric circuits and Ohm’s law  Power and energy in electric currents  AC and DC

3.  Electric charge ◦ An inherent physical property of certain subatomic particles that is responsible for electrical and magnetic phenomena ◦ Charge is represented by q ◦ SI unit is the coulomb(C)

5.  Like charges repel, unlike charges attract

6.  The force acting on each of two charged objects is directly proportional to the net charges on the objects and inversely proportional to the square of the distance between them

8.  E-Paper  FET(Field Effect Transistor)

9.  집진기 ( electrostatic precipitator) Bluebird Co. Ltd.

10.  Copier( 복사기 )

11.  Conductor( 도체 ) ◦ a material allowing the flow of electric charge ◦ 일반적인 금속, 구리, 금, 은 등  Insulator( 부도체, 절연체 ) ◦ a substance that resists the flow of electric current ◦ 세라믹, 플라스틱, 석영, 공기, 등

13.  Current ◦ The rate of flow of electric charge. ◦ The amount of charge that flows by per second ◦ SI unit is the ampere(A or amp) ◦ Measured by ammeter

14.  Conductor ◦ Copper, silver, gold, aluminum  Insulator ◦ Plastic, rubber  Semiconductor ◦ Ge, Si,

17.  Voltage ◦ The work that a charged particle can do divided by the size of the charge ◦ The energy per unit charge given to charged particles by a power supply ◦ The SI unit is the volt(V), joule per coulomb

18.  The current in a conductor is equal to the voltage applied to it divided by its resistance

19. 3V

21.  Series (current is the same)

22.  Parallel (voltage is the same)

23. 12V Series & Parallel

25. 120V 1875W

26.  Used for 3 minutes Energy? 120V 1875W

27.  AC(alternating current)  DC(direct current)