Explain clearly why, in terms of electric energy generation from nonrenewable fuels, an electric appliance can be, at most, only about efficient.
Answer to relevant QuestionsWhy does the battery design shown in Fig. 17.1 require a chemical membrane? If the voltage (V) were plotted (vertically) on the same graph versus current (I) for two ohmic conductors with different resistances, how could you tell which is less resistive? A battery labeled 12.0 V supplies 1.90 A 6.00-Ω to a resistor (Fig. 17.17). (a) What is the terminal voltage of the battery? (b) What is its internal resistance? Two copper wires have equal lengths, but the diameter of one is three times that of the other. (a) The resistance of the thinner wire is (1) 3, (2) 1/3, (3) 9, (4) 1/9 times that of the resistance of the thicker wire. (b) ...Figure 17.18 shows data on the dependence of the current through a resistor on the voltage across that resistor. (a) Is the resistor ohmic? Explain your reasoning. (b) What is the value of its resistance? (c) Use the data ...
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