Find the power dissipated (in W) in each of the following extension cords: Part (a) An extension cord having a 0.085 Ω resistance and through which 5.00 A is flowing. Part (b) A cheaper cord utilizing thinner wire and with a resistance of 0.32 Ω through which 5.00 A is flowing.

Find the power dissipated (in W) in each of the following extension cords: Part (a) An extension cord having a 0.085 Ω resistance and through which 5.00 A is flowing. Part (b) A cheaper cord utilizing thinner wire and with a resistance of 0.32 Ω through which 5.00 A is flowing.

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter21: Current And Direct Current Circuits

Section: Chapter Questions

Problem 28P

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Question

Find the power dissipated (in W) in each of the following extension cords:

Part (a) An extension cord having a 0.085 Ω resistance and through which 5.00 A is flowing.

Part (b) A cheaper cord utilizing thinner wire and with a resistance of 0.32 Ω through which 5.00 A is flowing.

Expert Solution

Step 1

Power = VI = I²R

Where

V = applied voltage

I = current.

R = resistance

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