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Question: Lightbulb A is marked "40.0 W 120 V," and lightbulb B is marked "60.0 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. R(40.0 W 120 V) = R(60.0 W 120 V) =
(b) During what time interval do 2.00 C pass into lightbulb A?
(c) Is the charge different upon its exit versus its entry into the lightbulb? Explain.
(d) In what time interval do 1.70 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.
A 21.0 ohm bulb is connected across the terminals of a 12.0v- battery having 4.50 ohm of internal resistance. What percentage of the power of the battery is dissipated across the internal resistance and hence is not available to the bulb?
Two tiny particles having charges of +7.00 C and -9.00 C are placed along the y-axis. The +7.00-µC particle is at y = 0.00 cm, and the other particle is at y = 40.00 cm. Where a third charged particle should be placed along the y-axis so that it does..
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