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- Check Your Understanding How would you use a river and two waterfalls to model a parallel configuration of two resistors? How does this analogy break down?Calculate the magnitude and direction of the durrents in each resistor of fig. 19-58. There are two solutions to this problem given on the website. However, both are leaveing out steps.When the switch shown in Fig. 19–45 is closed, what willhappen to the voltage across resistor R1 It will(a) increase. (b) decrease. (c) stay the same
- . (III) What would the current be in Fig. 19–61 if the 12- Ωresistor is shorted out (resistance= 0 )? Let = 0 r = 1.0 Ω .(II) Three 1.7 -KΩ resistors can be connected together infour different ways, making combinations of series and/orparallel circuits. What are these four ways, and what is thenet resistance in each case?For the circuit shown in Fig.a 20.0 Ω resistor is embedded in a large block of ice at 0.00°C, and the battery has negligible internal resistance. At what rate (in g /s) is this circuit melting the ice?
- (II) Eight 7.0-W Christmas tree lights are connected inseries to each other and to a 120-V source. What is theresistance of each bulb?the battery shown in the circuit in Figure 19.46 has no internal resistance. After you close the switch, the brightness of bulb B1 willA. increase. B. decrease. C. remain the same.(only 1 option is correct)Consider a circuit with three resistors, R1 = 225 Ω, R2 = 155 Ω, and R3 = 135 Ω, connected in parallel with a 24.0-Vbattery. (These are the same resistances and battery as in the series circuit in Example 21-10.) Find (a) the total currentsupplied by the battery and (b) the current through each resistor.