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Ch 26: Direct-Current Circuits
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All textbooksYoung & Freedman Calc 14th EditionCh 26: Direct-Current CircuitsProblem 26

Chapter 26, Problem 26

The batteries shown in the circuit in Fig. E26.24 have negligibly small internal resistances.

Find the current through (a) the 30.0-Ω resistor.

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Welcome back, everybody. We are making observations about the following circuit here and we are told that this first battery has a voltage of eight volts. This battery over here has a voltage of six volts. This resistor in the middle has a Distance of 25. And this resistor on the right has a resistance of 15. And we are tasked with finding what is the current flowing through the second resistor here. Well, since we're just looking at the second resistor, we can ignore everything in the middle and just do this, we can just create one giant loop that goes around the outside of our circuit. I'll just name this loop one and then we can apply Kirchoff loop rule here. So we have the voltage of the first battery which is eight minus the voltage of the resistor, which will be its resistance times our current that we want to find is equal to zero, subtracting eight from both sides and then divided by negative 15, we get that I two is equal to eight divided by 15, which when we plug into our calculator gives us a final answer of 0. amps. Corresponding to answer choice B Thank you all so much for watching. Hope this video helped. We will see you all in the next one.
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Textbook Question
Light Bulbs in Series and in Parallel. Two light bulbs have constant resistances of 400Ω and 800Ω. The two light bulbs are connected in series across a 120-V line. Afterwards, the two light bulbs are connected in parallel across the 120-V line. (g) In each situation, which of the two bulbs glows the brightest?
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Textbook Question
Light Bulbs in Series and in Parallel. Two light bulbs have constant resistances of 400Ω and 800Ω. The two light bulbs are connected in series across a 120-V line. Afterwards, the two light bulbs are connected in parallel across the 120-V line. (h) In which situation is there a greater total light output from both bulbs combined?
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Textbook Question
In the circuit shown in Fig. E26.31 the batteries have negligible internal resistance and the meters are both idealized. With the switch S open, the voltmeter reads 15.0 V.

(b) What will the ammeter read when the switch is closed?
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Textbook Question
In the circuit shown in Fig. E26.27

find (b) the unknown emfs ε_1 and ε_2.
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Textbook Question
In the circuit shown in Fig. E26.33 all meters are idealized and the batteries have no appreciable internal resistance.

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Textbook Question
An emf source with ε = 120V, a resistor with R = 80.0Ω, and a capacitor with C = 4.00 μF are connected in series. As the capacitor charges, when the current in the resistor is 0.900 A, what is the magnitude of the charge on each plate of the capacitor?

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