A heating element is made by maintaining a potential difference of 75.0 V across the length of a Nichrome wire that has a 2.60 x 10-6 m² cross section. Nichrome has a resistivity of 5.00 x 10-72'm. If the element dissipates 5000 W, what is its length? Give your answer in cm.

A heating element is made by maintaining a potential difference of 75.0 V across the length of a Nichrome wire that has a 2.60 x 10-6 m² cross section. Nichrome has a resistivity of 5.00 x 10-72'm. If the element dissipates 5000 W, what is its length? Give your answer in cm.

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 8P: A 0.900-V potential difference is maintained across a 1.50-m length of tungsten wire that has a...

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Question

A heating element is made by maintaining a potential
difference of 75.0 V across the length of a Nichrome wire that
has a 2.60 x 10-6 m² cross section. Nichrome has a resistivity
of 5.00 x 10-7 2•m. If the element dissipates 5000 W, what is
its length? Give your answer in cm.

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