Chapter 18 Electric Currents

SmartBoard Pre-Lecture Notes for Chapter 18

Chapter 18 Giancoli 6th Edition Web Resources

AP Syllabus

Chapter 18 Homework

Chapter Outline:

18-1  The Electric Battery (pg. 494)

• Batteries: wet cells and dry cells

18-2  Electric Current (pg. 496)   RE: Electric Current

• Current: the flow of + charge
• Current requires closed paths (circuits)

18-3  Ohm's Law (pg. 498)

• Resistance and resistors
• Ohm's Law
• How to read resistor color codes   RE: Resistors
• Mini Lab: Ohm's Law

18-4  Resistivity (pg. 500)

• Factors effecting resistivity
• Temperature and resistivity

18-5  Electric Power (pg. 502)

• Defining electric power   RE: Power
• Heat loss in resistors

18-6  Power in Household Circuits  (pg. 505)

• Analyzing household circuits

18-7  Alternating Current (pg. 506)   RE: Alternating Current

• The sinusoidal nature of AC   RE: AC Power
• Average power
• Peak voltage   RE: Opening a Live Circuit
• Peak current 
• RMS voltage
• RMS current
• 60 Hz. vs. 50 Hz.

18-8  Microscopic View of Current (pg. 509)

• Electron drift speed
• The electric field speed

18-10  The Human Nervous System (pg. 510)

• Nerve conduction