The copper windings of a motor have a resistance of 50 ohm at 20°C when the motor is idle. After the motor has run for several hours, the resistance rises to 58 .What is the temperature of the windings now? Ignore changes in the dimensions of the windings.

The copper windings of a motor have a resistance of 50 ohm at 20°C when the motor is idle. After the motor has run for several hours, the resistance rises to 58 .What is the temperature of the windings now? Ignore changes in the dimensions of the windings.

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 14P

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Question

The copper windings of a motor have a resistance of 50 ohm at
20°C when the motor is idle. After the motor has run for several
hours, the resistance rises to 58 .What is the temperature of the
windings now? Ignore changes in the dimensions of the windings.

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