Electrical Engineering › Section B · Resistance, Ohm's law, power, and energy › Topic B.4
Ohm's law
Push harder and more flows; add more opposition and less flows. Ohm's law puts that common-sense idea into one exact equation linking voltage, current and resistance, and it is the first tool of almost every circuit calculation in this course.
In this topic
- Cause, effect and opposition
- The law and its three forms
- Polarity and direction
- Worked example: finding a current
- Worked example: voltage and resistance
- Plotting Ohm's law
- Worked example: reading a graph
- When Ohm's law is not enough
- Opens, shorts and current sensing
- Common mistakes to avoid
- Key takeaways
This topic is part of Wuanberri Pro. Checking your access…