Step 2: After Step 1 we examine the problem till we are confident with a plan for finding the unknown. I plan to find everything by three laws. It may not be necessary to find everything, if we consider the only unknown is V, but for illustration, I shall find everything anyway. . Вy KCL: 3 At Node 3 i1-İ2 +1 A 10 Ω 1 A + At Node O i3-İ2 + 1 A is It is obvious that i3- iş = i1 (Is it to you?) 2 202 4 By KVL: Take a loop from 3 back to 3 via: 3-4-2-1-3: Vz+V3-V,+V1= 0 Another loop from 3 to 4 via V, back to 3 via V2: V4-V2 = 0 You may want to take another loop as the first but from 3 to 4 via V4. Try it and see that it can be derived from the two equations Next we write the conditions on these unknowns using the laws. By Ohm's law: V1= i,x 10; V2 = izx 2; V3 = i3x 20; V4= (1 A) x 10 ohms %3D above.
Step 2: After Step 1 we examine the problem till we are confident with a plan for finding the unknown. I plan to find everything by three laws. It may not be necessary to find everything, if we consider the only unknown is V, but for illustration, I shall find everything anyway. . Вy KCL: 3 At Node 3 i1-İ2 +1 A 10 Ω 1 A + At Node O i3-İ2 + 1 A is It is obvious that i3- iş = i1 (Is it to you?) 2 202 4 By KVL: Take a loop from 3 back to 3 via: 3-4-2-1-3: Vz+V3-V,+V1= 0 Another loop from 3 to 4 via V, back to 3 via V2: V4-V2 = 0 You may want to take another loop as the first but from 3 to 4 via V4. Try it and see that it can be derived from the two equations Next we write the conditions on these unknowns using the laws. By Ohm's law: V1= i,x 10; V2 = izx 2; V3 = i3x 20; V4= (1 A) x 10 ohms %3D above.
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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KVL and KCL
KVL stands for Kirchhoff voltage law. KVL states that the total voltage drops around the loop in any closed electric circuit is equal to the sum of total voltage drop in the same closed loop.
Sign Convention
Science and technology incorporate some ideas and techniques of their own to understand a system skilfully and easily. These techniques are called conventions. For example: Sign conventions of mirrors are used to understand the phenomenon of reflection and refraction in an easier way.
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