1) The document discusses circuits, Ohm's law, resistors, and capacitors. It provides definitions and equations for current, voltage, resistance, power, capacitance, and how these concepts relate to series and parallel circuits. 2) Key points include: current is the flow of charge, voltage causes current to flow, and resistance regulates current flow as described by Ohm's law. Resistors in series add their resistances while resistors in parallel reduce the total resistance. 3) Examples are provided to demonstrate calculating current, voltage, and resistance in series and parallel circuits using Ohm's law.

1. Circuits and Ohm’s Law Physics 102: Lecture 05

11. Compare V 1 the voltage across R 1 , with V 10 the voltage across R 10 . 1. V 1 >V 10 2. V 1 =V 10 3. V 1 <V 10 ACT: Series Circuit R 1 =1   0 R 10 =10 

17. Johnny “Danger” Powells uses one power strip to plug in his microwave, coffee pot, space heater, toaster, and guitar amplifier all into one outlet. Toaster This is dangerous because… (By the way, power strips are wired in parallel.) ACT: Your Kitchen 1. The resistance of the kitchen circuit is too high. 2. The voltage across the kitchen circuit is too high. 3. The current in the kitchen circuit is too high. Coffee Pot Microwave 10 A 5 A 10 A 25 A

21. Voltage Current Resistance Series Parallel Summary Different for each resistor. V total = V 1 + V 2 Increases R eq = R 1 + R 2 Same for each resistor I total = I 1 = I 2 Same for each resistor. V total = V 1 = V 2 Decreases 1/R eq = 1/R 1 + 1/R 2 Wiring Each resistor on the same wire. Each resistor on a different wire. Different for each resistor I total = I 1 + I 2 R 1 R 2 R 1 R 2