E l e c t r i c a l a n d C o m p u t e r E n g i n e e r i n gF E R e v i e w

2/7/2018 Page Title 1

J o h n S c a l z o , S e n i o r I n s t r u c t o r

j s c a l z 1 @ l s u . e d u

• Physics Review Capacitance

• Direct Current

• Resistance

• KVL, KCL

• Charging/Discharging a Capacitor

• Inductance

• Symbols

• Complex Numbers

• AC Circuits

• Complex Power

Topics to Cover in the ECE review for the FE:

2/7/2018 2Table of Contents

2/7/2018 4Electrical and Computer Engineering

Physics Review:

• Electric Field due to a single charge

• Uniform electric field due to a uniform distribution of surface charge (Gauss’s law):

• Electric potential due to a single charge:

• Potential difference in uniform electric field:

∆𝑉𝑉 = 𝐸𝐸𝐸𝐸• Potential Energy:

∆𝑈𝑈 = 𝑞𝑞∆𝑉𝑉

• Charge in a uniform electric field: F = qE qE=ma 𝑞𝑞∆𝑉𝑉 = 𝐾𝐾𝑓𝑓 − 𝐾𝐾𝑖𝑖

𝐸𝐸 = 𝑘𝑘𝑞𝑞𝑟𝑟2 𝑘𝑘 = 8.89x109 Nm2/C2

𝐸𝐸 = 𝜎𝜎∈0

surface charge densitypermittivity of free space

𝑉𝑉 =𝑘𝑘𝑞𝑞𝑟𝑟

2/7/2018 5Page Title

Examples 1,2,3

2/7/2018 6Parallel Plate Capacitance

Capacitance (Farads)𝐶𝐶 = 𝜀𝜀𝜀𝜀𝑑𝑑

Energy stored in Capacitance

𝐶𝐶 = 𝑄𝑄∆𝑉𝑉

2/7/2018 7Capacitors Connected in Series

2/7/2018 8Capacitors Connected in Parallel

2/7/2018 9Page Title

Switch to lecture notes

• DC Circuit Analysis• AC Steady State Circuit Analysis• Steady State Power (Complex Power)

• power factor• Power factor correction

• Diodes• Op-Amps• Transistors