EET1015CDirectCurrentCircuits
Lecture7
Prof.YingSong
Review:AnalyzingSeriesCircuits
The total resistance is the sum of each individual resistances
RT = R1 + R2 + R3 + . + Rn
Apply Ohm's law to the entire circuit to find the total current.
IT = VS RT
Indiv
EET1015CDirectCurrentCircuits
Lecture6
Prof.YingSong
Review:Energy&Power
Symbol
Unit
Definition
Energy
W
Joules (J)
kWh
the ability to do work
Power
P
Watts (W)
hp
P=W/t
Power in Electric Circuits (Watts Law)
P = IV
For power dissipated in resistors:
P =
EET1015CDirectCurrentCircuits
Lecture5
Prof.YingSong
Review:OhmsLaw
16
V
I=
R
V = IR
I (m A )
V
R=
I
14
12
8
4
0
0
2
4
6
8
10
V (V )
The slope represents the conductance.
The reciprocal of the conductance is the
resistance:
Chapter4:EnergyandPower
Energy
EET1015CDirectCurrentCircuits
Lecture4
Prof.YingSong
Review:InSeries
Two components are connected in series if they are
connected to each other at exactly one point and
there is no other component connected to that point.
RT can be measured by connecting
EET1015CDirectCurrentCircuits
Lecture3
Prof.YingSong
Review
Often we express quantities as numbers multiplied
by powers of ten to reduce the number of zeroes we
have to read when dealing with very large or very
small numbers.
In scientific notation, a qua
EET1015CDirectCurrentCircuits
Lecture2
Prof.YingSong
Announcements
All results should be in
Engineering notation and have 3
significant digits
Homework 1
Problems: Page 16-18: 6, 15,17, 24, 32 & Page
68-69: 21, 22, 25, 27
Lab 1
Due Monday Jan 9, 2012
Temp