Electric current, resistance, and circuits

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Introduction to electric current, resistance, and ohm's law

1 Electric current

2 Drift velocity

3 Section summary

4 Conceptual questions

5 Problems & Exercises

Ohm’s law: resistance and simple circuits

Resistance and resistivity

Electric power and energy

Alternating current versus direct current

Resistors in series and parallel

Electromotive force: terminal voltage

Kirchhoff’s rules

Dc voltmeters and ammeters

1 Analog meters: galvanometers

2 Galvanometer as voltmeter

3 Galvanometer as ammeter

4 Taking measurements alters the circuit

5 Section summary

6 Conceptual questions

7 Problem exercises

Electric hazards and the human body

Nerve conduction–electrocardiograms

Source: OpenStax, Physics 101. OpenStax CNX. Jan 07, 2013 Download for free at http://legacy.cnx.org/content/col11479/1.1

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