College Physics 10th Edition by Raymond Serway,Chris Vuille

Exercise 61

Lightbulb A is marked "25.0 W 120 V," and lightbulb B is marked "100 W 120 V." These labels mean that each lightbulb has its respective power delivered to it when it is connected to a constant 120-V source. (a) Find the resistance of each lightbulb. (b) During what time interval does 1.00 C pass into lightbulb A (c) Is this charge different upon its exit versus its entry into the lightbulb Explain. (d) In what time interval does 1.00 J pass into lightbulb A (e) By what mechanisms does this energy enter and exit the lightbulb Explain. (f) Find the cost of running lightbulb A continuously for 30.0 days, assuming the electric company sells its product at $0.110 per kWh.