Two identical incandescent light bulbs, each with resistance R = 2 Ω, are connected to a source with E = 8 V and negligible internal resistance. Find the current through each bulb, the potential difference across each bulb, and the power delivered to each bulb and to the entire network if the bulbs are connected (a) in series and (b) in parallel. (c) Suppose one of the bulbs burns out; that is, its filament breaks and current can no longer flow through it. What happens to the other bulb in the series case? In the parallel case?

Three resistors, R1 = 500 Ω, R2 = 600 Ω and, R3 = 230 Ω, are connected in parallel, and to a 12 V battery to form a closed circuit.  Calculate the total current that would be measured near the battery's positive terminal, before it forks through the separate resistors.

> Lightbulb A is marked "60.0 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. Ω RA RB Ω = (b) During what time interval does 1.20 C pass into lightbulb A? S (c) Is this charge different upon its exit versus its entry into the lightbulb? Yes No Explain. This answer has not been graded yet. (d) In what time interval does 1.40 J pass into lightbulb A? S (e) By what mechanisms does this energy enter and exit the lightbulb? Explain. This answer has not been graded yet. (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. (

Three 85.0-w, 135-V lightbulbs are connected across a Av = 135-V power source, as shown in the figure below. Find the total power delivered to the three bulbs and the potential difference across each. Assume the resistance of each bulb is constant (even though, in reality, the resistance increases markedly with current). R1 AV R2 R3 (a) Find the total power delivered to the three bulbs. (b) Find the potential difference across each bulb. AVR. V = AVR2 V V