Chapter 28: Q. 62 (page 793)
For the circuit shown in FIGURE P28.62, find the current through and the potential difference across each resistor. Place your results in a table for ease of reading.
Short Answer
The results are in table
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Chapter 28: Q. 62 (page 793)
For the circuit shown in FIGURE P28.62, find the current through and the potential difference across each resistor. Place your results in a table for ease of reading.
The results are in table
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| | |
| | |
| | |
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Get started for freeA 50 mF capacitor that had been charged to 30 V is dis-charged through a resistor. FIGURE P28.70 shows the capacitor voltage as a function of time. What is the value of the resistance?
The capacitor in FIGURE begins to charge after the switch closes at.
a. What is a very long time after the switch has closed?
b. What isin terms of E,R, and C?
c. In this circuit, does localid="1649091794998" ? Explain.
d. Find an expression for the current I at time t. Graph I from to localid="1649091939933"
You’ve made the finals of the Science Olympics! As one of your tasks, you’re given 1.0 g of aluminum and asked to make a wire, using all the aluminum, that will dissipate 7.5 W when connected to a 1.5 V battery. What length and diameter will you choose for your wire?
A refrigerator has a compressor, but the compressor runs only of the time.
a. If electricity costs, what is the monthly (30 day) cost of running the refrigerator?
b. A more energy-efficient refrigerator with an compressor costs more. If you buy the more expensive refrigerator, how many months will it take to recover your additional cost?
Bulbs A, B, and C in FIGURE Q28.10 are identical, and all are glowing.
a. Rank in order, from most to least, the brightnesses of the three bulbs. Explain.
b. Suppose a wire is connected between points 1 and 2. What happens to each bulb? Does it get brighter, stay the same, get dimmer, or go out? Explain
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