Copyright Goodheart-Willcox Co., Inc. 64 Electricity 6. 7. 8. Critical Thinking Questions and Activities 1. Consider holiday or party string lights, which can function as follows: when one bulb is removed or burns out, all the lights in the string go out. Write a paper explaining this in terms of series circuits and Kirchhoff’s laws. 2. How many series circuits can you identify? For example: A simple toaster heater element and power switch are both wired in series. The lamp that lights up the inside of your car and door switch are both wired in series. Can you think of more? Make a list. 3. To include power conservation in a circuit, a timer can be built in that switches a load on or off. Design a series circuit that achieves this goal. R1 = 100 Ω ET = _____ R2 = 200 Ω R3 = _____ IT = 2 A RT = _____ ER3 = 200 V ER1 = _____ ER2 = _____ R1 R3 R2 ER1 = 50 V ET = _____ ER2 = 150 V R1 = _____ ER3 = 200 V R2 = _____ IT = 0.25 A R3 = _____ R1 R3 R2 ES = E supply, source or applied ER1 = _____ R1 = 1000 Ω ES = _____ R3 = 500 Ω RT = _____ ER2 = 10 V ER3 = _____ IR1 = 0.001 A R2 = _____ R1 R3 R2