Lecture 4

Lecture 4 - 1 ECE 201 Lecture 4 Kirchhoff’s Laws...

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 1 ECE 201, Lecture 4 Kirchhoff’s Laws Computation of power, passive sign convention; P absorbed = V 12 × I 12 , but Math may be complicated; Ohm’s Law: V 12 = I 12 × R Not V = I × R ! Resistors in serial and parallel; Resistivity Summary of previous lecture 2 Example • A generates 20W of power, find V A • Find power absorbed by B • If element C generates 3W of power, find V c • If element D absorbs 27W of power, find I D • If element E absorbs 2W of power, find I E • Find the power absorbed by element F Answers (Please use the formulas in the previous slide): (1) V A = 5 V, (2) P B = 14 W, (3) V C = −1 V, (4) I D = − 9 A, (5) I E = 2 A, (6) P F = − 20 W. 3 Four dependent sources • Voltage controlled voltage source • Current controlled voltage source • Voltage controlled current source • Current controlled current source • V x , I y , V z and I w are voltages and currents specified elsewhere in the circuit. • Each dependent source provides an equation in circuit analysis. 1.3 I w 2.6 V z + _ 3.2 I y + _ 2.5 V x 4 Example Find R so that V out /V in =150 +- I 1 V in 10I 1 V R V out 10 Ω 10 Ω +- +- 5V R 1 1 1 10 10 5 50 50 150 10 30 in R out R in in V I V I R V V I R V R V R = Ω = = = = = Ω = Ω 1 1 1 10 10 1 1 5( ) 10 50 500 500 150 10 3 in in R out R R in in V I V V I R R V V V I R V R V...
View Full Document

This note was uploaded on 02/13/2012 for the course ECE 201 taught by Professor All during the Fall '08 term at Purdue.

Page1 / 22

Lecture 4 - 1 ECE 201 Lecture 4 Kirchhoff’s Laws...

This preview shows document pages 1 - 5. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online