18 Modern Commercial Wiring Copyright Goodheart-Willcox Co., Inc. 18 Modern Commercial Wiring Copyright Goodheart-Willcox Co., Inc. Use the following circuit for Questions 12–16. 120 V Source R1 = 10 Ω R3 = 20 Ω R4 = 35 Ω R2 = 25 Ω 12. What is the voltage at R 1 ? A. 13.3 V B. 24.8 V C. 58.2 V D. 65.25 V 13. What is the voltage at R 2 ? A. 12.8 V B. 33.25 V C. 48.65 V D. 82.5 V 14. What is the voltage at R 3 ? A. 10.2 V B. 16.75 V C. 26.67 V D. 32.82 V 15. What is the voltage at R 4 ? A. 14.67 V B. 23.91 V C. 46.67 V D. 63.16 V 16. What is the total current in the circuit? A. 0.67 A B. 1.33 A C. 2.75 A D. 3.33 A Use the following circuit for Questions 17–20. 120 V Source R1 = 20 Ω R2 = 40 Ω 17. What is the current at R 1 ? A. 2 A B. 3 A C. 6 A D. 9 A 18. What is the current at R 2 ? A. 2 A B. 3 A C. 6 A D. 9 A 19. What is the total current in the circuit? A. 2 A B. 3 A C. 6 A D. 9 A 20. What is the total resistance in the circuit? A. 7.2 Ω B. 9.5 Ω C. 11.6 Ω D. 13.3 Ω