Answered: The resistivity of gold is 2.44 x…

The resistivity of gold is 2.44 x 10-82-m at a temperature of 20°C. A gold wire, 1.8 mm in diameter and 14 cm long, carries a current of 480 mA. The power dissipated in the wire is closest to:

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 49P: Taking R = 1.00 k and = 250 V in Figure P21.49, determine the direction and magnitude of the...

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Concept explainers

Resistivity

Resistivity is a characteristic property of the conductor’s material that measures the extent to which the material opposes the flow of current. It is denoted by the Greek letter “rho”. Electrical resistivity, also known as specific resistance, depends on the nature of the material of the conductor and is unaffected by its dimensions.

Question

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The resistivity of gold is 2.44 x 10-80-m at a temperature of 20°C. A gold wire, 1.8 mm in diameter and 14 cm long, carries a current of 480 mA. The power dissipated in the
wire is closest to:
O 0.077 mW
O 0.25 mW
O 0.19 mW
O 0.31 mW
O 0.14 mW

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