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Chapter 28: Q. 53 (page 793)
What is the current in theresistor in FIGURE P28.53?
The current will be
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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?
he switch in a closes at and, after a very long time, the capacitor is fully charged. Find expressions for
(a) the total energy supplied by the battery as the capacitor is being charged,
(b) total energy dissipated by the resistor as the capacitor is being charged, and
(c) the energy stored in the capacitor when it is fully charged. Your expressions will be in terms of E, R, and C.
(d) Do your results for parts a to c show that energy is conserved? Explain.
The switch in FIGURE CP28.80 has been closed for a very long time.
a. What is the charge on the capacitor?
b. The switch is opened at t = 0 s. At what time has the charge on the capacitor decreased to 10% of its initial value?
You have a resistor, a resistor, a resistor, and a battery. Draw a diagram of a circuit in which all three resistors are used and the battery delivers 9.0 W of power.
Rank in order, from largest to smallest, the powers to dissipated by the four resistors in FIGURE
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