Physics Chapter 26
This document was uploaded by user and they confirmed that they have the permission to share it. If you are author or own the copyright of this book, please report to us by using this DMCA report form. Report DMCA
Overview
Download & View Physics Chapter 26 as PDF for free.
More details
- Words: 225
- Pages: 2
DC circuits
Chapter 26
Section 1: EMF for a battery and Terminal Voltage in a closed circuit: The relation is: EMF=V+Ir or =IR+Ir where *EMF (ζ) is the electromotive force of the battery, *V is the terminal voltage of the battery with internal resistance (r) in a closed circuit as shown in the figure. Also V=IR the voltage across the external resistance (R) *I is the current flow through the circuit where:
I=
ζ R+r
This formula is called ohm's law for closed circuit. Study the example (26-1) page 659. Section 2 Resistors in series and in parallel: 1. In series and in parallel: Req=R1+R2+R3+…… 2. In parallel 1 Study examples (26-2 and 3) page 662
Circuit with Series and parallel: Study examples (26- 4, 5 and 6) pages 663 and 664 .
Kirchhoffs rules
.Kirchhoffs Rules : used for analyzing complicated circuits :Junction rule .1
At any junction point, the sum of all currents entering the junction must equal (the sum of all currents leaving the junction: (conservation of charges
I = I +I +I
:(Loop rule (voltage rule .2 The sum of the changes in potential around any closed path of a circuit must be .(zero. (Conservation of energy .Using the following simple circuit :The sum of all the changes in potential in going around the circuit is
V +V +V = -6.8-5.2+12=zero
Chapter 26
Section 1: EMF for a battery and Terminal Voltage in a closed circuit: The relation is: EMF=V+Ir or =IR+Ir where *EMF (ζ) is the electromotive force of the battery, *V is the terminal voltage of the battery with internal resistance (r) in a closed circuit as shown in the figure. Also V=IR the voltage across the external resistance (R) *I is the current flow through the circuit where:
I=
ζ R+r
This formula is called ohm's law for closed circuit. Study the example (26-1) page 659. Section 2 Resistors in series and in parallel: 1. In series and in parallel: Req=R1+R2+R3+…… 2. In parallel 1 Study examples (26-2 and 3) page 662
Circuit with Series and parallel: Study examples (26- 4, 5 and 6) pages 663 and 664 .
Kirchhoffs rules
.Kirchhoffs Rules : used for analyzing complicated circuits :Junction rule .1
At any junction point, the sum of all currents entering the junction must equal (the sum of all currents leaving the junction: (conservation of charges
I = I +I +I
:(Loop rule (voltage rule .2 The sum of the changes in potential around any closed path of a circuit must be .(zero. (Conservation of energy .Using the following simple circuit :The sum of all the changes in potential in going around the circuit is
V +V +V = -6.8-5.2+12=zero
Related Documents
Physics Chapter 26
June 2020 0
Chapter 26
June 2020 11
Chapter 26
December 2019 6
Chapter 26
October 2019 20
Chapter 26
November 2019 11