12 3 points Breakers are used in most houses to prevent excess current in the circuits of your home. In the circuit below, a circuit breaker (labeled CB) is placed after the power source. It will "trip" (or turn the circuit off) if more than 21A of current is pulled from the source. Find the missing Resistance, R, that will just barely trip the switch, and then complete the VIRP chart for this case. 20 0 CB R 30 0 120V