Ag Power Web Enhanced Course Materials
Electrical
- Introduction
- Lecture Notes
- Circuit & Relay Demonstrations
- Animated Examples
(Coming Soon) - Job Sheets
- Submitting Job Sheets
- Terms/Definitions
Reference Links
Helpful Links
If you experience any problems with the site, please contact Pete Hoffman immediately so corrections can be made. Pete can be reached on campus, via email at phoffman@swtc.edu or by phone at 1.800.362.3322 ext 2727.
Related Lecture Notes
- Basic Laws & Facts
- Electrical Units of Measurement
- Electrical Component
Concepts - Ohms Law
- Electrical Symbols
- Resistor Color Codes
- Conductors/Wire
- Electrical Troubleshooting
Circuits
Meters
Ohm's Law - Calculating Voltage
What is Voltage (E)?
Voltage is the potential difference in a circuit and it is caused
by the unbalanced state of atoms. You need a complete circuit made
of conductive material in order to have current flow and the current
will flow from the negative source to the positive source. Ohms
law states that if you have one volt applied to a one ohm resistance
the current will be one amp.
(E = I x R) |
Voltage (E) on the equation is missing and you have the (I) and (R) left. Because they are divided by the vertical line that means to multiply the two values. |
 |
This is a simple circuit with a current
of 12 amps (12A) and a resistive load of 1 Ohm (1 Since we know the battery is suppling 12 Amps (I), and there is a resistive load of 1 Ohm (R) placed in series, the current will be: E = 12(I) times 1(R) or E = 12 |
).
Use the formula explained on the left side of the page to
calculate the voltage.Click the term to see examples of Current and Resistance.