Linear Circuits 1 - 02 - Voltage Sources

Name: Linear Circuits 1 - 02 - Voltage Sources
Rating: 4.6 (140 reviews)

Using Voltage Sources and Why Ground Location Is Less Important than You Think

Created byMark Budnik, Mark M. Budnik

Last updated 8/2020

English

English [Auto],

What you'll learn

What Is a Voltage Source
Ohm's Law
What Is a Negative Voltage Source

Course content

1 section • 10 lectures • 32m total length

Agenda0:12
A Word About Linear Circuits Textbooks....0:19
A New Ohm's Law6:05
Just in case you did not see our first module, Linear Circuits 01 - Potential, Current, and Resistance, we are including our new definition of Ohm's Law here.
Review2:09
Review voltage sources, apply ohm's law, and explore ground placement; demonstrate how a source boosts voltage from the negative to the positive terminal by its supply voltage, with simple examples.
Example with 2 Voltage Sources3:58
Another Example with 2 Voltage Sources4:42
Explore solving a two-source circuit with a 470 ohm resistor by tracking ground, applying voltage-source equations, and using Ohm's law to compute the current as 6.38 mA in engineering notation.
Another Another Example with 2 Voltage Sources, but This Time We Moved Ground4:02
Move ground between two voltage sources, apply ohm's law to a resistor, and confirm an 11-volt delta across 680 ohms yields the same current, despite ground position.
Example Showing that We Can Move the Ground Anywhere We Want....7:14
Moving ground locations does not affect the voltage drop or current; the 33-ohm resistor shows a 3-volt drop and 90.9 mA, with 7 V and -4 V sources.
Analogy, or How Tall Is Your Teacher?2:46
Review1:09
Voltage sources have one job: supply the voltage. Ohm's law delta v equals i r, delta v is source minus load, and location doesn't change delta v or current direction.

Requirements

High School or College Physics

Description

Day 2 of Linear Circuits. Students spend more time working with voltage sources. Problems are solved a couple different ways, each with a different ground location. It turns out that the ground location in a circuit is not that important after all.

The material covers all of the lecture material from a second lecture in a traditional, sophomore-level linear circuits class.

Who this course is for:

Beginner Engineering and Physics Students