3. A certain copper wire has a resistance of 25 ohms at 10°C. Take the temperature coefficient at 10°C to be 0.00409 deg/C. What must be the maximum operating temperature of the wire if its resistance is to increase by at most 20%?

3. A certain copper wire has a resistance of 25 ohms at 10°C. Take the temperature coefficient at 10°C to be 0.00409 deg/C. What must be the maximum operating temperature of the wire if its resistance is to increase by at most 20%?

Materials Science And Engineering Properties

1st Edition

ISBN:9781111988609

Author:Charles Gilmore

Publisher:Charles Gilmore

Chapter4: Temperature Effects On Atom Arrangements And Atom Motion

Section: Chapter Questions

Problem 4.2P

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Concept explainers

Dependence on mechanical properties

The mechanical properties of materials are those structures that include the reaction to the load used. Metal switching features determine the scope of the usefulness of the content and establish the expected service life. Machine structures are also used to help distinguish and identify material objects. The most common mechanical properties considered are strength, ductility, stiffness, impact resistance, and resilience to fractures.

Question

3. A certain copper wire has a resistance of 25 ohms at 10°C.
Take the temperature coefficient at 10°C to be 0.00409
deg/C. What must be the maximum operating temperature
of the wire if its resistance is to increase by at most 20%?

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