Chapter 21, Problem 38PCE

Holiday Lights In a string of holiday lights, 50 lights—with a resistance of 13.5 Ω each—are connected in series. (a) If the string of lights is plugged into a 120.0-V outlet, what current flows through it? (b) Three of the lights burn out and activate their shunt resistors, effectively reducing the resistance of each one to 0.15 Ω. How much current now flows through the entire string of lights?