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Unformatted text preview: Chapter 20  "Electric Circuits" I = q t I = current (amperes) q = charge (coulombs) t = time (seconds) Ohms Law V = IR V = voltage (volts) I = current (amperes) R = resistance (ohms) Resistance and Resistivity R = L A R = resistance (ohms) = resistivity (ohmm) L = length (m) A = crosssectional area (m 2 ) = o 1 + ( T T o ) [ ] = resistivity at T (ohmm) = resistivity at T o (ohmm) = temperature coefficient of resistivity (C o )1 T = temperature ( o C) T o = temperature ( o C) R = R o 1 + ( T T o ) [ ] R = resistance at T (ohmm) R = resistance at T o (ohmm) = temperature coefficient of resistivity (C o )1 T = temperature ( o C) T o = temperature ( o C) Power P = IV = I 2 R = V 2 R P = power (watts) I = current (amperes) V = voltage (volts) R = resistance (ohms) Alternating Current V = V o sin 2 ft I = I o sin 2 ft V = voltage (volts) V o = peak voltage (volts) f = frequency (Hz) t = time (seconds) I = current (amperes) I o = peak current (amps)...
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This note was uploaded on 04/09/2008 for the course PHYS 101 taught by Professor Sharp during the Spring '08 term at Ohio State.
 Spring '08
 Sharp
 Charge, Current, Resistance

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