Cpatel_ Electric_Current_and_Circuits.docx - Current topic Electric Current and Circuits Chapters Text Book Ch 20.1-20.7 and Ch 21.1 21.2 and 21.4 Name

# Cpatel_ Electric_Current_and_Circuits.docx - Current topic...

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Current topic: Electric Current and Circuits Chapters Text Book: Ch. 20.1-20.7 and Ch. 21.1, 21.2, and 21.4 Concepts Summary: Name *Describe IYOW 1 Electric Current ( I ) Rate at which charge flows and flow of like charges I = Q t Q= amount of charge passing through an area △t= time 2 Ohm’s Law Relationship between current (I), voltage (V), and resistance (R) I = V R 3 Resistance and Resistivity Resistance (R) is resistance of an object and depends on the material it is made of and its shape Resistivity ( p ) is a natural property of a material and it is independent of size and shape R = pL A of a cylinder Length(L) Area (A) 4 Electric Power (P) Rate in which energy is supplied by a source or to lose (heat, electricity, etc.) by a device Rate is in watts P=IV, P=V 2 /R, and P=I 2 R 5 Alternating Current (AC) and Direct Current (DC) AC is a system that puts out V=V 0 sin2πƒt (V is voltage, t is time, V 0 is peak voltage, and ƒ is frequency(hertz))

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DC is the electric current

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