2049_ch26A - Current and Resistance PHY2049: Chapter 26 1...

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1 PHY2049: Chapter 26 Current and Resistance
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2 PHY2049: Chapter 26 What You Will Learn in This Chapter Nature of electric current Drift speed, current and current density Current and voltage measurements Conductivity and resistivity Ohm’s law Temperature variations of resistance Superconductors Power in electric circuits Electrical activity in the heart
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3 PHY2049: Chapter 26 The electric current is defined as (1) Amount of charge per time (2) Amount of charge per area (3) Amount of charge per volume (4) Amount of charge
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PHY2049: Chapter 26 EMF EMF device performs work on charge carriers Converts energy to electrical energy Moves carriers from low potential to high potential Maintains potential difference across terminals Various types of EMF devices Battery Electrolytic reaction Generator Magnetic field Fuel cell Oxidation of fuel Solar cell Electromagnetic energy Thermopile Nuclear decay Example: battery
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This note was uploaded on 02/28/2012 for the course PHY 2049 taught by Professor Any during the Spring '08 term at University of Florida.

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2049_ch26A - Current and Resistance PHY2049: Chapter 26 1...

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