26.31 In the circuit shown in Fig. E26.31 all meters are idealized and the batteries have no appreciable internal resistance. (a) Find the read- ing of the voltmeter with the switch S open. Which point is at a higher poten- tial: a or b? (b) With S closed, find the reading of the voltmeter and the amme- STV 25.0 V 75.0 Ω ter. Which way (up or down) does the current flow through the switch? Figure E26.31 100.0 Ω a L15.0

26.31 In the circuit shown in Fig. E26.31 all meters are idealized and the batteries have no appreciable internal resistance. (a) Find the read- ing of the voltmeter with the switch S open. Which point is at a higher poten- tial: a or b? (b) With S closed, find the reading of the voltmeter and the amme- STV 25.0 V 75.0 Ω ter. Which way (up or down) does the current flow through the switch? Figure E26.31 100.0 Ω a L15.0

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Concept explainers

Ohm's law

Ohm’s law is a prominent concept in physics and electronics. It gives the relation between the current and the voltage. It is used to analyze and construct electrical circuits. Ohm's law states that the voltage across a conductor is directly proportional to the current flowing through it.

Path of Least Resistance

In a series of alternate pathways, the direction of least resistance is the actual or metaphorical route that offers the least resistance to forwarding motion by a given individual or body.

Question

sv
26.31 In the circuit shown in
Fig. E26.31 all meters are idealized
and the batteries have no appreciable
internal resistance. (a) Find the read-
ing of the voltmeter with the switch S
open. Which point is at a higher poten-
tial: a or b? (b) With S closed, find the
reading of the voltmeter and the amme-
25.0 V
75.0
Ω
ter. Which way (up or down) does the current flow through the switch?
Figure E26.31
100.0 Ω
a
L15.0

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