Question

Find the power dissipated in each of these extension cords: (a) an extension cord having a $0.0600-\Omega$ resistance and through which 5.00 A is flowing; (b) a cheaper cord utilizing thinner wire and with a resistance of 0.300$\Omega .$

Name: Problem 44, Chapter 20: College Physics for AP® Courses
Uploaded: 2019-08-18T10:13:26-08:00
Duration: 49 s
Channel: Ze-Han Lee
Description: Find the power dissipated in each of these extension cords: (a) an extension cord having a 0.0600-Ωresistance and through which 5.00 A is flowing; (b) a cheaper cord utilizing thinner wire and with a resistance of 0.300Ω.

   Find the power dissipated in each of these extension cords: (a) an extension cord having a $0.0600-\Omega$ resistance and through which 5.00 A is flowing; (b) a cheaper cord utilizing thinner wire and with a resistance of 0.300$\Omega .$

College Physics for AP® Courses

Irina Lyublinskaya,…

Chapter 20, Problem 44

Instant Answer

Solved by Expert Ze-Han Lee

08/18/2019

Step 1

Step 1: The power dissipated in a resistor (or in this case, an extension cord) can be calculated using the formula $P = I^2R$, where $P$ is the power, $I$ is the current, and $R$ is the resistance. Show more…

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Find the power dissipated in each of these extension cords: (a) an extension cord having a $0.0600-\Omega$ resistance and through which 5.00 A is flowing; (b) a cheaper cord utilizing thinner wire and with a resistance of 0.300$\Omega .$

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Key Concepts

Resistive Power Dissipation

This concept involves calculating the power lost as heat in a resistive element using the formula P = I²R, where P represents power, I is the current, and R is the resistance. It is essential for understanding how energy is converted into heat in electrical circuits, which is particularly important in applications like extension cords where energy losses can affect performance and safety.

Electrical Resistance

Resistance is a fundamental property of materials that quantifies how strongly they oppose the flow of electric current. Measured in ohms, resistance influences both the current flow and the amount of power dissipated as heat in a circuit, making it a critical factor in the design and analysis of electrical systems.

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