Light bulbs are labeled with their power output. For example, when a lightbulb is labeled 60 W, it is assumed that the bulb is connected to a 120- V source. Suppose you have two bulbs. A60- W bulb is followed by a 40- W bulb in series to a 120- V source. Which one glows brighter? Why? What happens if you switch the order of the bulbs? Are either of them at full power rating?
Answer to relevant QuestionsThree identical resistors are connected to a battery. Two are wired in parallel, and that combination is followed in series by the third resistor. Which resistor has (a) The largest current, (b) The largest voltage, and ...Find the current in and voltage across the resistor shown in Fig. 18.30. 10-Æ For the circuit in Fig. 18.33, find (a) The current in each resistor, (b) The voltage across each resistor, (c) The power delivered to each resistor, and (d) The total power delivered by the battery. Apply Kirchhoff’s rules to the circuit in Fig. 18.36, and find (a) The current in each resistor and (b) The rate at which energy is being delivered to the 8.0-Ω resistor 8.0. A 1.00-μF capacitor, initially charged to 12 V, discharges when it is connected in series with a resistor. (a) What resistance is necessary to cause the capacitor to have only of its initial charge 1.50 s after starting? ...
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