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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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In the circuit below, the total power dissipated by the circuit is 48 W. What is the value of the unknown resistor? What is the value of the current that flows through the 12 Ω resistor?

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Expert Solution
Step 1

The expression for the power in terms of resistor is,

Physics homework question answer, step 1, image 1

Rearrange the above expression in terms of Rtotal ,

Physics homework question answer, step 1, image 2

Step 2

The expression for total resistance and equivalent resistance,

Physics homework question answer, step 2, image 1

To determine the total resistance,

Physics homework question answer, step 2, image 2

Physics homework question answer, step 2, image 3

Step 3

Thus the unknown value R is,

Physics homework question answer, step 3, image 1

The expression for total voltage, in terms of total resistance,

Physics homework question answer, step 3, image 2

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