2. Electric Currents & Circuits AP – Ch 20 & 21

3. Teaching LAB YOU teach – Simple Circuit – Series Circuit – Parallel Circuit – Combo Circuit – Kirchoff’s Laws

4. Ch 20 & 21 Outline 1 st Half of PPTX – New stuff from OpenStax text 2 nd Half – My old stuff

6. Current

7. Figure 20.2 The rate of flow of charge is current. An ampere is the flow of one coulomb through an area in one second.

9. Note Direction of I…

10. Conventional Current Physical Current + + - -

12. Ohm’s Law

13. Started as two proportions – I through a RESISTOR  V drop – I through a RESISTOR  1/R of resistor Put together:

15. Ohmic Material Any material where R is independent of I and V – Most metals & common conductors

17. Resistivity

20. Electrical Power

21. Intro Stuff Power – Same as regular P, but different

22. Intro Stuff Power …

25. Sect 20.6: Hume Bean Hazards

26. Ch 21: Circuits

45. Intro Stuff Electromotive Force – emf Maximum V of battery Current – Flow of charge

46. Intro Stuff

48. Ohm ’ s Law – States linear relationship between V & R

50. Intro Stuff Resistance – Says what it means e - has to ‘ fight ’ thru a wire or ‘ resistor ’

52. Intro Stuff Resistance – Radio Shack SCAM!

53. Intro Stuff Resistance – Radio Shack SCAM!

55. CONVENTIONAL Current ELECTRON Current

56. CONVENTIONAL Current ELECTRON Current

72. Intro Stuff Power – Same as regular P, but different

73. Intro Stuff Power …

76. Intro Stuff Wiring Circuits – Series / Parallel Parallel

82. WHY? C //

83. WHY? C Series

84. Quantitative Summary

85. Coulomb’s Law: Force between any 2 charges

86. Electric Field Strength: Force on test Q

87. Electric Potential Energy: Fd

88. Electric Field (av): Potential at a distance

89. Electric POTENTIAL: NOT a vector…

90. Capacitance: Property of Capacitors

91. Capacitance: Property of Capacitors

92. Energy stored in Capacitor:

93. Definition of Electrical Current: SI Unit - Amps

94. Definition of Electrical Current: SI Unit – Amps (A)

95. Resistance in a WIRE: SI Unit – Ohms (  )

96. OHM’S LAW: All Circuits Must Obey…

97. OHM’S LAW: All Circuits Must Obey… 12V 6666

98. Electrical Power: From P=W/t

99. Series Circuits

100. Parallel Circuits

101. Circuits w/Capacitors

105. EXAMPLE #1 Three 12  resistors are used in two circuits; one in series and one in parallel. What is the R equivalent of each circuit?

106. Series 12 

107. Parallel 12 

109. Series + Parallel 12  66 18 