Basic Circuits Challenge - Version 5.1 Basic Circuits Challenge consists of a set of fifteen activities to help you teach basic electrical concepts. Exercise Titles: Electric Ideas, Electrical Components, Powers of Ten, Color Codes, Ohm's Law One, Ohm's Law Two, Power One, Power Two, Series Voltage Sources, Series Circuits One, Series Circuits Two, Parallel Circuits One, Parallel Circuits Two, Series Parallel Circuits One and Series Parallel Circuits Two.