EE 1270 Introduction to Electric Circuits Suketu Naik

1EE 1270: Introduction to Electric Circuits

Lecture 4:Equivalent Networks

Chapter 3Simple Resistive

Circuits

EE 1270 Introduction to Electric Circuits Suketu Naik

2Resistors in Series

Req=equivalent resistance

EE 1270 Introduction to Electric Circuits Suketu Naik

3Resistors in SeriesReq=equivalent resistance

4321 RRRRReq

EE 1270 Introduction to Electric Circuits Suketu Naik

4Resistors in ParallelReq=equivalent resistance

4321

11111

RRRRReq

EE 1270 Introduction to Electric Circuits Suketu Naik

5Example 3.1

EE 1270 Introduction to Electric Circuits Suketu Naik

6AP 3.1

EE 1270 Introduction to Electric Circuits Suketu Naik

7Voltage Divider Circuit

EE 1270 Introduction to Electric Circuits Suketu Naik

8Voltage Divider Examples

EE 1270 Introduction to Electric Circuits Suketu Naik

9Current Divider Circuit

EE 1270 Introduction to Electric Circuits Suketu Naik

10Current Divider ExamplesExample 3.3: Find power dissipated in 6 Ω resistor

AP 3.3: Find R such that 4A flow through 80 Ω resistor

EE 1270 Introduction to Electric Circuits Suketu Naik

11How do you measure Current and Voltage in a circuit?

EE 1270 Introduction to Electric Circuits Suketu Naik

12Wheatstone Bridge: Measure Resistance

Example 3.7

EE 1270 Introduction to Electric Circuits Suketu Naik

13Delta-to-Wye (Pi-to-Tee) Equivalent CircuitsDelta or Pi Configuration

Wye or Tee Configuration

EE 1270 Introduction to Electric Circuits Suketu Naik

14Delta-to-Wye Transformation

Example 3.7: Find power supplied by 40V source

EE 1270 Introduction to Electric Circuits Suketu Naik

15Delta-to-Wye Transformation

AP3.8: Use Y-to-Delta transformation to find v