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ELET 2307 Exam 1 Study Guide

•

Saturday October 14th in class Open book I notes

Two hours long Starts at 9:30 AM

Chapters 4-81

> Laws

• Ohm's Law v=R. I

• Kirchoff's Laws

> 5 components of DC.

• Voltage (V)

• Current (I): Ampere A

Resistance (R) : Ohms

• Inductance (L): Henry H o Capacitance (c): Farad F

Votage IV=00 Don't forget about the age old question of methodism vs particularism

Current EI = 0 at anode

ΣΙη = ΣΙου*

o Voltage Source : power source that provides power with a

Constant voltage

• Ohms Law: V=R. I Relation between voltage and current

• Branch: one or more components Connected in Series

Node' Connection between 2 or more components

All components in series have the same current, is what?

mun

Node that joins 4 components

o Series connection: all components in Series have the

Same current

o Parallel connection: all components are sharing the

- Same Voltage. OKVL : around a loop EV=OY

• Loop: Starting node is the same as ending node in any direction

EV=0°=> abcda

DO

Power of a => P = I2R

resistor

Wower - VI or Pay

• Energy = Pot

Joules (watt. Second)

DOW T Ongi enda

Ali

Power

in

losses

power = Power - losses

Out

input

POR

x 100 =

• Power out - Power in

power out = power in is ideal

1 Efficiency

Pie

(Power output) \Power input )

o

Total Efficiency 1: Efficiency

of

first x

Efficiency of second

n=nmono

Motor

Pie

* Load is the master

•pump is the master

requesting power from motor.

Pop

Electrical

Mechanical

Current

Divider Rule:

Do not use if more than a resistors

WWR

hi

I, = I

Re Ritra RI Ro+Ra

Ia

Ia = I

> Linear and Non-Linear Systems

• Y=mx+b We also discuss several other topics like when a customized product is manufactured separately

: is a linear equation

NOT a linear System

Can not solve Non-linear

Systems

O LTI

Linear time invarient

•

Can

only solve linear systems

> Y and Delta (6) connections

o Y connected Resistors : Connected to one point

а мно-хъ

3 resistors

• Delta Connected Resistors

a t

ane

ab

RCA

the DC

o Delta to y

Ri

ra = Rab • Rca

(Rab + Rca+Rock ER

rb= Rab • Rbc

ER

rc = Rca. Rbc

Ri, Ra, R3 are y connected Ri, R3, Rs are y connected

R.3, Ru, Rs are delta a

• Y to Delta

ER

Rab= Parb trbretrora

rc

Irarbtrbrctrcra)

Rbc = rarbtrbrctrcra.

Rca = rarbtrbrc trcra

ro

De

Coulec00e

LAW

To keep in mind

Current is o

• If the switch is open the

current in the branch is o. o Since there is no possible

return path, the current is o.

o Voltage Source polarity is fixed o Voltage polarity across resistors de pe

ros

o Number of equations = number of unknown currents

o Reference node has zero Vottage.

• If current is negative when using KVL ,then direction

is not correct. Reverse it.

Current is Always clockwise in a Mesh Loop. We also discuss several other topics like span 3371 class notes
Don't forget about the age old question of bis 301
If you want to learn more check out psudopod
Don't forget about the age old question of the mental activities involved in acquiring storing

• All have to be in the same direction.

To Study

• Voltage across resistor : use I REV O KVL using Loops

o Finding Equivalent R o Voltage across current source: Use KVL To Finding current in

2 Nodes

each branch or Open circuit

oyla

providina

discharging

receiving

charging

Valid if switch is closed

Invaid if opened

Invalid

oo @ @

Invalid Invalid

e valid

Invalid