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For those who want to explore further, there is an expanded analysis of Ohm’s Law in Appendix B. You should see now, however, why Why did the LED in the last activity burnt burn out: you weren’t limiting the current!? ADD CONTENT HERE.
fix (nonexistent appendix) references
Resistors are not polarized; you can connect them in either direction, and they will function the same. Their ''nominal resistance'' is stated in Ohms (Ω).
If you look at a resistor, however, you’ll notice no print on the side; only colored bands. They are used to indicate the nominal resistance value! Take a look at Appendix A [[Resistance#Resistor color coding|resistor color coding]] for more information.
===Going further===
I=____________mA
==Activity 4: Potentiometers, and series vs parallel==
You already know that changing the resistance of part of a circuit also changes the current; more resistance equals less current, and less resistance equals more current. So by extension, varying ''the resistance between two paths should change their currents as well''. Congratulations: you’ve just made a current crossfader!
For a more detailed explanation of series and parallel, see Appendix C: Series Versus Parallel[[Resistance#Resistors in series and parallel|resistors in series and parallel]].
==Activity 5: Soldering==
